css 如何写一个渐变效果

效果图

主要css 

.flex1{

  background: -webkit-linear-gradient(right,#BEB9F9,#66DEBA);

  background: -o-linear-gradient(right,#BEB9F9,#66DEBA);

  background: -moz-linear-gradient(right,#BEB9F9,#66DEBA);

  background: -mos-linear-gradient(right,#BEB9F9,#66DEBA);

  background: linear-gradient(right,#BEB9F9,#66DEBA);

}

.flex2{

  background: -webkit-linear-gradient(right,#BEB9F9,#FECF4B);

  background: -o-linear-gradient(right,#BEB9F9,#FECF4B);

  background: -moz-linear-gradient(right,#BEB9F9,#FECF4B);

  background: -mos-linear-gradient(right,#BEB9F9,#FECF4B);

  background: linear-gradient(right,#BEB9F9,#FECF4B);

}

.flex3{

  background: -webkit-linear-gradient(right,#BEB9F9,#FCA4B6);

  background: -o-linear-gradient(right,#BEB9F9,#FCA4B6);

  background: -moz-linear-gradient(right,#BEB9F9,#FCA4B6);

  background: -mos-linear-gradient(right,#BEB9F9,#FCA4B6);

  background: linear-gradient(right,#BEB9F9,#FCA4B6);

}