delphiXE TAlphaColor与TColor以及Html颜色代码之间的关系

delphiXE TAlphaColor与TColor以及Html颜色代码之间的关系

一、html颜色代码大全

https://blog.csdn.net/sxc1414749109/article/details/79260543

其数值，即为全透明的TAlphaColor数值，即透明度为0，我们可以在其六位数值前两位（00-99）透明度值，99即代表 完全不透明。

  //:16进制用"$"表示,每两位表示一种颜色,从左往右,HTML中颜色表示为"RGB"即:红绿蓝,而delphi中的颜色表示为"BGR"即:蓝绿红,HTML中蓝色#0000FF,DELPHI中的蓝色$FF0000 rgb(红,绿,蓝),三个的取值范围:0~255.如:rgb(255,0,0)红色.

二、delphi颜色定义：uses System.UITypes;

2.1、TColorRec

TColorRec = record
  const
    SystemColor = $FF000000;
    // System Colors (仅针对Windows：)
    cSCROLLBAR = 0;
    cBACKGROUND = 1;
    cACTIVECAPTION = 2;
    cINACTIVECAPTION = 3;
    cMENU = 4;
    cWINDOW = 5;
    cWINDOWFRAME = 6;
    cMENUTEXT = 7;
    cWINDOWTEXT = 8;
    cCAPTIONTEXT = 9;
    cACTIVEBORDER = 10;
    cINACTIVEBORDER = 11;
    cAPPWORKSPACE = 12;
    cHIGHLIGHT = 13;
    cHIGHLIGHTTEXT = 14;
    cBTNFACE = 15;
    cBTNSHADOW = $10;
    cGRAYTEXT = 17;
    cBTNTEXT = 18;
    cINACTIVECAPTIONTEXT = 19;
    cBTNHIGHLIGHT = 20;
    c3DDKSHADOW = 21;
    c3DLIGHT = 22;
    cINFOTEXT = 23;
    cINFOBK = 24;
    cHOTLIGHT = 26;
    cGRADIENTACTIVECAPTION = 27;
    cGRADIENTINACTIVECAPTION = 28;
    cMENUHILIGHT = 29;
    cMENUBAR = 30;
    cENDCOLORS = cMENUBAR;
    cDESKTOP = cBACKGROUND;
    c3DFACE = cBTNFACE;
    c3DSHADOW = cBTNSHADOW;
    c3DHIGHLIGHT = cBTNHIGHLIGHT;
    c3DHILIGHT = cBTNHIGHLIGHT;
    cBTNHILIGHT = cBTNHIGHLIGHT;
    SysScrollBar = TColor(SystemColor or cSCROLLBAR);
    SysBackground = TColor(SystemColor or cBACKGROUND);
    SysActiveCaption = TColor(SystemColor or cACTIVECAPTION);
    SysInactiveCaption = TColor(SystemColor or cINACTIVECAPTION);
    SysMenu = TColor(SystemColor or cMENU);
    SysWindow = TColor(SystemColor or cWINDOW);
    SysWindowFrame = TColor(SystemColor or cWINDOWFRAME);
    SysMenuText = TColor(SystemColor or cMENUTEXT);
    SysWindowText = TColor(SystemColor or cWINDOWTEXT);
    SysCaptionText = TColor(SystemColor or cCAPTIONTEXT);
    SysActiveBorder = TColor(SystemColor or cACTIVEBORDER);
    SysInactiveBorder = TColor(SystemColor or cINACTIVEBORDER);
    SysAppWorkSpace = TColor(SystemColor or cAPPWORKSPACE);
    SysHighlight = TColor(SystemColor or cHIGHLIGHT);
    SysHighlightText = TColor(SystemColor or cHIGHLIGHTTEXT);
    SysBtnFace = TColor(SystemColor or cBTNFACE);
    SysBtnShadow = TColor(SystemColor or cBTNSHADOW);
    SysGrayText = TColor(SystemColor or cGRAYTEXT);
    SysBtnText = TColor(SystemColor or cBTNTEXT);
    SysInactiveCaptionText = TColor(SystemColor or cINACTIVECAPTIONTEXT);
    SysBtnHighlight = TColor(SystemColor or cBTNHIGHLIGHT);
    Sys3DDkShadow = TColor(SystemColor or c3DDKSHADOW);
    Sys3DLight = TColor(SystemColor or c3DLIGHT);
    SysInfoText = TColor(SystemColor or cINFOTEXT);
    SysInfoBk = TColor(SystemColor or cINFOBK);
    SysHotLight = TColor(SystemColor or cHOTLIGHT);
    SysGradientActiveCaption = TColor(SystemColor or cGRADIENTACTIVECAPTION);
    SysGradientInactiveCaption = TColor(SystemColor or cGRADIENTINACTIVECAPTION);
    SysMenuHighlight = TColor(SystemColor or cMENUHILIGHT);
    SysMenuBar = TColor(SystemColor or cMENUBAR);
    SysNone = TColor($1FFFFFFF);
    SysDefault = TColor($20000000);
    // 实际的颜色表：
    Aliceblue = TColor($FFF8F0);
    Antiquewhite = TColor($D7EBFA);
    Aqua = TColor($FFFF00);
    Aquamarine = TColor($D4FF7F);
    Azure = TColor($FFFFF0);
    Beige = TColor($DCF5F5);
    Bisque = TColor($C4E4FF);
    Black = TColor($000000);
    Blanchedalmond = TColor($CDEBFF);
    Blue = TColor($FF0000);
    Blueviolet = TColor($E22B8A);
    Brown = TColor($2A2AA5);
    Burlywood = TColor($87B8DE);
    Cadetblue = TColor($A09E5F);
    Chartreuse = TColor($00FF7F);
    Chocolate = TColor($1E69D2);
    Coral = TColor($507FFF);
    Cornflowerblue = TColor($ED9564);
    Cornsilk = TColor($DCF8FF);
    Crimson = TColor($3C14DC);
    Cyan = TColor($FFFF00);
    Darkblue = TColor($8B0000);
    Darkcyan = TColor($8B8B00);
    Darkgoldenrod = TColor($0B86B8);
    Darkgray = TColor($A9A9A9);
    Darkgreen = TColor($006400);
    Darkgrey = TColor($A9A9A9);
    Darkkhaki = TColor($6BB7BD);
    Darkmagenta = TColor($8B008B);
    Darkolivegreen = TColor($2F6B55);
    Darkorange = TColor($008CFF);
    Darkorchid = TColor($CC3299);
    Darkred = TColor($00008B);
    Darksalmon = TColor($7A96E9);
    Darkseagreen = TColor($8FBC8F);
    Darkslateblue = TColor($8B3D48);
    Darkslategray = TColor($4F4F2F);
    Darkslategrey = TColor($4F4F2F);
    Darkturquoise = TColor($D1CE00);
    Darkviolet = TColor($D30094);
    Deeppink = TColor($9314FF);
    Deepskyblue = TColor($FFBF00);
    Dimgray = TColor($696969);
    Dimgrey = TColor($696969);
    Dodgerblue = TColor($FF901E);
    Firebrick = TColor($2222B2);
    Floralwhite = TColor($F0FAFF);
    Forestgreen = TColor($228B22);
    Fuchsia = TColor($FF00FF);
    Gainsboro = TColor($DCDCDC);
    Ghostwhite = TColor($FFF8F8);
    Gold = TColor($00D7FF);
    Goldenrod = TColor($20A5DA);
    Gray = TColor($808080);
    Green = TColor($008000);
    Greenyellow = TColor($2FFFAD);
    Grey = TColor($808080);
    Honeydew = TColor($F0FFF0);
    Hotpink = TColor($B469FF);
    Indianred = TColor($5C5CCD);
    Indigo = TColor($82004B);
    Ivory = TColor($F0FFFF);
    Khaki = TColor($8CE6F0);
    Lavender = TColor($FAE6E6);
    Lavenderblush = TColor($F5F0FF);
    Lawngreen = TColor($00FC7C);
    Lemonchiffon = TColor($CDFAFF);
    Lightblue = TColor($E6D8AD);
    Lightcoral = TColor($8080F0);
    Lightcyan = TColor($FFFFE0);
    Lightgoldenrodyellow = TColor($D2FAFA);
    Lightgray = TColor($D3D3D3);
    Lightgreen = TColor($90EE90);
    Lightgrey = TColor($D3D3D3);
    Lightpink = TColor($C1B6FF);
    Lightsalmon = TColor($7AA0FF);
    Lightseagreen = TColor($AAB220);
    Lightskyblue = TColor($FACE87);
    Lightslategray = TColor($998877);
    Lightslategrey = TColor($998877);
    Lightsteelblue = TColor($DEC4B0);
    Lightyellow = TColor($E0FFFF);
    LtGray = TColor($C0C0C0);
    MedGray = TColor($A4A0A0);
    DkGray = TColor($808080);
    MoneyGreen = TColor($C0DCC0);
    LegacySkyBlue = TColor($F0CAA6);
    Cream = TColor($F0FBFF);
    Lime = TColor($00FF00);
    Limegreen = TColor($32CD32);
    Linen = TColor($E6F0FA);
    Magenta = TColor($FF00FF);
    Maroon = TColor($000080);
    Mediumaquamarine = TColor($AACD66);
    Mediumblue = TColor($CD0000);
    Mediumorchid = TColor($D355BA);
    Mediumpurple = TColor($DB7093);
    Mediumseagreen = TColor($71B33C);
    Mediumslateblue = TColor($EE687B);
    Mediumspringgreen = TColor($9AFA00);
    Mediumturquoise = TColor($CCD148);
    Mediumvioletred = TColor($8515C7);
    Midnightblue = TColor($701919);
    Mintcream = TColor($FAFFF5);
    Mistyrose = TColor($E1E4FF);
    Moccasin = TColor($B5E4FF);
    Navajowhite = TColor($ADDEFF);
    Navy = TColor($800000);
    Oldlace = TColor($E6F5FD);
    Olive = TColor($008080);
    Olivedrab = TColor($238E6B);
    Orange = TColor($00A5FF);
    Orangered = TColor($0045FF);
    Orchid = TColor($D670DA);
    Palegoldenrod = TColor($AAE8EE);
    Palegreen = TColor($98FB98);
    Paleturquoise = TColor($EEEEAF);
    Palevioletred = TColor($9370DB);
    Papayawhip = TColor($D5EFFF);
    Peachpuff = TColor($B9DAFF);
    Peru = TColor($3F85CD);
    Pink = TColor($CBC0FF);
    Plum = TColor($DDA0DD);
    Powderblue = TColor($E6E0B0);
    Purple = TColor($800080);
    Red = TColor($0000FF);
    Rosybrown = TColor($8F8FBC);
    Royalblue = TColor($E16941);
    Saddlebrown = TColor($13458B);
    Salmon = TColor($7280FA);
    Sandybrown = TColor($60A4F4);
    Seagreen = TColor($578B2E);
    Seashell = TColor($EEF5FF);
    Sienna = TColor($2D52A0);
    Silver = TColor($C0C0C0);
    Skyblue = TColor($EBCE87);
    Slateblue = TColor($CD5A6A);
    Slategray = TColor($908070);
    Slategrey = TColor($908070);
    Snow = TColor($FAFAFF);
    Springgreen = TColor($7FFF00);
    Steelblue = TColor($B48246);
    Tan = TColor($8CB4D2);
    Teal = TColor($808000);
    Thistle = TColor($D8BFD8);
    Tomato = TColor($4763FF);
    Turquoise = TColor($D0E040);
    Violet = TColor($EE82EE);
    Wheat = TColor($B3DEF5);
    White = TColor($FFFFFF);
    Whitesmoke = TColor($F5F5F5);
    Yellow = TColor($00FFFF);
    Yellowgreen = TColor($32CD9A);
    Null = TColor($00000000);
    class var ColorToRGB: function (Color: TColor): Longint;
{    class operator Implicit(const C: TColor): TColorRec; inline;
    class operator Implicit(const C: TColorRec): TColor; inline;
    class operator Implicit(const C: TColorRec): Longint; inline;
    class operator Explicit(const C: TColorRec): Longint; inline;}
    case Cardinal of
      0:
        (Color: TColor);
      2:
        (HiWord, LoWord: Word);
      3:
{$IFDEF BIGENDIAN}
        (A, B, G, R: System.Byte);
{$ELSE}
        (R, G, B, A: System.Byte);
{$ENDIF}
  end;

2.2、TColor数值范围：

TColor = -$7FFFFFFF-1..$7FFFFFFF;

2.3、TAlphaColor

TAlphaColor的表达（TAlphaColor和TColor之间的关系）：

方式1：上述TColor的常量数值，比如：Yellow，即Yellow=TColor($00FFFF);

方式2：上述TColor函数的参数部分的反转加前缀‘#透明度’，比如：$00FFFF，反转后为：#FFFF00，同样是代表了颜色Yellow，

但此时代表全透明，透明度为0，不透明的表达为：#99FFFF00。即：前缀‘#透明度’，00<透明度<99

2.4、TAlphaColorRec

TAlphaColorRec = record
  const
    Alpha = TAlphaColor($FF000000);
    Aliceblue = Alpha or TAlphaColor($F0F8FF);
    Antiquewhite = Alpha or TAlphaColor($FAEBD7);
    Aqua = Alpha or TAlphaColor($00FFFF);
    Aquamarine = Alpha or TAlphaColor($7FFFD4);
    Azure = Alpha or TAlphaColor($F0FFFF);
    Beige = Alpha or TAlphaColor($F5F5DC);
    Bisque = Alpha or TAlphaColor($FFE4C4);
    Black = Alpha or TAlphaColor($000000);
    Blanchedalmond = Alpha or TAlphaColor($FFEBCD);
    Blue = Alpha or TAlphaColor($0000FF);
    Blueviolet = Alpha or TAlphaColor($8A2BE2);
    Brown = Alpha or TAlphaColor($A52A2A);
    Burlywood = Alpha or TAlphaColor($DEB887);
    Cadetblue = Alpha or TAlphaColor($5F9EA0);
    Chartreuse = Alpha or TAlphaColor($7FFF00);
    Chocolate = Alpha or TAlphaColor($D2691E);
    Coral = Alpha or TAlphaColor($FF7F50);
    Cornflowerblue = Alpha or TAlphaColor($6495ED);
    Cornsilk = Alpha or TAlphaColor($FFF8DC);
    Crimson = Alpha or TAlphaColor($DC143C);
    Cyan = Alpha or TAlphaColor($00FFFF);
    Darkblue = Alpha or TAlphaColor($00008B);
    Darkcyan = Alpha or TAlphaColor($008B8B);
    Darkgoldenrod = Alpha or TAlphaColor($B8860B);
    Darkgray = Alpha or TAlphaColor($A9A9A9);
    Darkgreen = Alpha or TAlphaColor($006400);
    Darkgrey = Alpha or TAlphaColor($A9A9A9);
    Darkkhaki = Alpha or TAlphaColor($BDB76B);
    Darkmagenta = Alpha or TAlphaColor($8B008B);
    Darkolivegreen = Alpha or TAlphaColor($556B2F);
    Darkorange = Alpha or TAlphaColor($FF8C00);
    Darkorchid = Alpha or TAlphaColor($9932CC);
    Darkred = Alpha or TAlphaColor($8B0000);
    Darksalmon = Alpha or TAlphaColor($E9967A);
    Darkseagreen = Alpha or TAlphaColor($8FBC8F);
    Darkslateblue = Alpha or TAlphaColor($483D8B);
    Darkslategray = Alpha or TAlphaColor($2F4F4F);
    Darkslategrey = Alpha or TAlphaColor($2F4F4F);
    Darkturquoise = Alpha or TAlphaColor($00CED1);
    Darkviolet = Alpha or TAlphaColor($9400D3);
    Deeppink = Alpha or TAlphaColor($FF1493);
    Deepskyblue = Alpha or TAlphaColor($00BFFF);
    Dimgray = Alpha or TAlphaColor($696969);
    Dimgrey = Alpha or TAlphaColor($696969);
    Dodgerblue = Alpha or TAlphaColor($1E90FF);
    Firebrick = Alpha or TAlphaColor($B22222);
    Floralwhite = Alpha or TAlphaColor($FFFAF0);
    Forestgreen = Alpha or TAlphaColor($228B22);
    Fuchsia = Alpha or TAlphaColor($FF00FF);
    Gainsboro = Alpha or TAlphaColor($DCDCDC);
    Ghostwhite = Alpha or TAlphaColor($F8F8FF);
    Gold = Alpha or TAlphaColor($FFD700);
    Goldenrod = Alpha or TAlphaColor($DAA520);
    Gray = Alpha or TAlphaColor($808080);
    Green = Alpha or TAlphaColor($008000);
    Greenyellow = Alpha or TAlphaColor($ADFF2F);
    Grey = Alpha or TAlphaColor($808080);
    Honeydew = Alpha or TAlphaColor($F0FFF0);
    Hotpink = Alpha or TAlphaColor($FF69B4);
    Indianred = Alpha or TAlphaColor($CD5C5C);
    Indigo = Alpha or TAlphaColor($4B0082);
    Ivory = Alpha or TAlphaColor($FFFFF0);
    Khaki = Alpha or TAlphaColor($F0E68C);
    Lavender = Alpha or TAlphaColor($E6E6FA);
    Lavenderblush = Alpha or TAlphaColor($FFF0F5);
    Lawngreen = Alpha or TAlphaColor($7CFC00);
    Lemonchiffon = Alpha or TAlphaColor($FFFACD);
    Lightblue = Alpha or TAlphaColor($ADD8E6);
    Lightcoral = Alpha or TAlphaColor($F08080);
    Lightcyan = Alpha or TAlphaColor($E0FFFF);
    Lightgoldenrodyellow = Alpha or TAlphaColor($FAFAD2);
    Lightgray = Alpha or TAlphaColor($D3D3D3);
    Lightgreen = Alpha or TAlphaColor($90EE90);
    Lightgrey = Alpha or TAlphaColor($D3D3D3);
    Lightpink = Alpha or TAlphaColor($FFB6C1);
    Lightsalmon = Alpha or TAlphaColor($FFA07A);
    Lightseagreen = Alpha or TAlphaColor($20B2AA);
    Lightskyblue = Alpha or TAlphaColor($87CEFA);
    Lightslategray = Alpha or TAlphaColor($778899);
    Lightslategrey = Alpha or TAlphaColor($778899);
    Lightsteelblue = Alpha or TAlphaColor($B0C4DE);
    Lightyellow = Alpha or TAlphaColor($FFFFE0);
    LtGray = Alpha or TAlphaColor($C0C0C0);
    MedGray = Alpha or TAlphaColor($A0A0A0);
    DkGray = Alpha or TAlphaColor($808080);
    MoneyGreen = Alpha or TAlphaColor($C0DCC0);
    LegacySkyBlue = Alpha or TAlphaColor($F0CAA6);
    Cream = Alpha or TAlphaColor($F0FBFF);
    Lime = Alpha or TAlphaColor($00FF00);
    Limegreen = Alpha or TAlphaColor($32CD32);
    Linen = Alpha or TAlphaColor($FAF0E6);
    Magenta = Alpha or TAlphaColor($FF00FF);
    Maroon = Alpha or TAlphaColor($800000);
    Mediumaquamarine = Alpha or TAlphaColor($66CDAA);
    Mediumblue = Alpha or TAlphaColor($0000CD);
    Mediumorchid = Alpha or TAlphaColor($BA55D3);
    Mediumpurple = Alpha or TAlphaColor($9370DB);
    Mediumseagreen = Alpha or TAlphaColor($3CB371);
    Mediumslateblue = Alpha or TAlphaColor($7B68EE);
    Mediumspringgreen = Alpha or TAlphaColor($00FA9A);
    Mediumturquoise = Alpha or TAlphaColor($48D1CC);
    Mediumvioletred = Alpha or TAlphaColor($C71585);
    Midnightblue = Alpha or TAlphaColor($191970);
    Mintcream = Alpha or TAlphaColor($F5FFFA);
    Mistyrose = Alpha or TAlphaColor($FFE4E1);
    Moccasin = Alpha or TAlphaColor($FFE4B5);
    Navajowhite = Alpha or TAlphaColor($FFDEAD);
    Navy = Alpha or TAlphaColor($000080);
    Oldlace = Alpha or TAlphaColor($FDF5E6);
    Olive = Alpha or TAlphaColor($808000);
    Olivedrab = Alpha or TAlphaColor($6B8E23);
    Orange = Alpha or TAlphaColor($FFA500);
    Orangered = Alpha or TAlphaColor($FF4500);
    Orchid = Alpha or TAlphaColor($DA70D6);
    Palegoldenrod = Alpha or TAlphaColor($EEE8AA);
    Palegreen = Alpha or TAlphaColor($98FB98);
    Paleturquoise = Alpha or TAlphaColor($AFEEEE);
    Palevioletred = Alpha or TAlphaColor($DB7093);
    Papayawhip = Alpha or TAlphaColor($FFEFD5);
    Peachpuff = Alpha or TAlphaColor($FFDAB9);
    Peru = Alpha or TAlphaColor($CD853F);
    Pink = Alpha or TAlphaColor($FFC0CB);
    Plum = Alpha or TAlphaColor($DDA0DD);
    Powderblue = Alpha or TAlphaColor($B0E0E6);
    Purple = Alpha or TAlphaColor($800080);
    Red = Alpha or TAlphaColor($FF0000);
    Rosybrown = Alpha or TAlphaColor($BC8F8F);
    Royalblue = Alpha or TAlphaColor($4169E1);
    Saddlebrown = Alpha or TAlphaColor($8B4513);
    Salmon = Alpha or TAlphaColor($FA8072);
    Sandybrown = Alpha or TAlphaColor($F4A460);
    Seagreen = Alpha or TAlphaColor($2E8B57);
    Seashell = Alpha or TAlphaColor($FFF5EE);
    Sienna = Alpha or TAlphaColor($A0522D);
    Silver = Alpha or TAlphaColor($C0C0C0);
    Skyblue = Alpha or TAlphaColor($87CEEB);
    Slateblue = Alpha or TAlphaColor($6A5ACD);
    Slategray = Alpha or TAlphaColor($708090);
    Slategrey = Alpha or TAlphaColor($708090);
    Snow = Alpha or TAlphaColor($FFFAFA);
    Springgreen = Alpha or TAlphaColor($00FF7F);
    Steelblue = Alpha or TAlphaColor($4682B4);
    Tan = Alpha or TAlphaColor($D2B48C);
    Teal = Alpha or TAlphaColor($008080);
    Thistle = Alpha or TAlphaColor($D8BFD8);
    Tomato = Alpha or TAlphaColor($FF6347);
    Turquoise = Alpha or TAlphaColor($40E0D0);
    Violet = Alpha or TAlphaColor($EE82EE);
    Wheat = Alpha or TAlphaColor($F5DEB3);
    White = Alpha or TAlphaColor($FFFFFF);
    Whitesmoke = Alpha or TAlphaColor($F5F5F5);
    Yellow = Alpha or TAlphaColor($FFFF00);
    Yellowgreen = Alpha or TAlphaColor($9ACD32);
    Null = TAlphaColor($00000000);
    constructor Create(const Color: TAlphaColor);
    class var ColorToRGB: function (Color: TAlphaColor): Longint;
    case Cardinal of
      0:
        (Color: TAlphaColor);
      2:
        (HiWord, LoWord: Word);
      3:
{$IFDEF BIGENDIAN}
        (A, R, G, B: System.Byte);
{$ELSE}
        (B, G, R, A: System.Byte);
{$ENDIF}
  end;

三、根据“html颜色代码大全”设置TAlphaColor

1、html颜色代码大全

https://blog.csdn.net/sxc1414749109/article/details/79260543

其数值，即为全透明的TAlphaColor数值，即透明度为0，我们可以在其六位数值前两位（00-99）透明度值，99即代表 完全不透明。

2、组件的Fill.Color属性：即TAlphaColor

根据：html颜色代码大全，将6位16进制前加两位透明度数值，即可

#1A1A1A：代表纯色黄"Yellow"

#851A1A1A：85%透明度的黄"Yellow"，即黄"Yellow"的TAlphaColor数值

 

首先要弄清楚是否需要一个额外的类型限定符.
TAlphaColors在“System.UITypes”单元中声明:
Type
TAlphaColors = TAlphaColorRec;
一旦你清楚的知道这一点,那就OK了.
当然，还有一个技巧可以绕过这个限定符的使用。直接引用“System.UIConsts”单
元，然后您可以使用颜色值，如“claRed”，“claBlack”。
    Uses
    System.UIConsts;
    //...
memo1.FontColor := claRed; // Alternative:

Rectangle6.Fill.Color := claRed;

ARect.Stroke.Color:=claNull;//:也可://TAlphaColors.Null;//:也可:TAlphaColorRec.Null;//:也可:TAlphaColor($00000000);