IE9+와 호환되는 CSS3 그라데이션 배경색을 사용하는 방법

linear-gradient(#fff, #75aaa3);
 linear-gradient(to bottom, #fff,#75aaa3); 
linear-gradient(to top, #75aaa3, #fff); 
linear-gradient(180deg, #fff, #75aaa3); 
linear-gradient(to bottom, #fff 0%, #75aaa3 100%);

//从下至上
#text.btt{
background: -webkit-linear-gradient(bottom,#fff, #75aaa2);
background: -o-linear-gradient(bottom,#fff, #75aaa2);
background: -moz-linear-gradient(bottom,#fff, #75aaa2);
background: linear-gradient(to top,#fff, #75aaa2); /* 标准的语法（必须放在最后） */
}

//带透明度
#text.opac{
background: -webkit-linear-gradient(rgba(256,256,256,0), #75aaa2);
background: -o-linear-gradient(rgba(256,256,256,0), #75aaa2);
background: -moz-linear-gradient(rgba(256,256,256,0), #75aaa2);
background: linear-gradient(rgba(256,256,256,0), #75aaa2); /* 标准的语法（必须放在最后） */
}