styles.less

.mynored(@color){
	@mygreen:red(@color);
	@myblue:blue(@color);
	@mynored:rgb(0,@mygreen,@myblue);
}

.mybefore{
	background-color:#AAAAAA;
	width:160px;
	height:120px;
}

.myafter{
	.mynored(#AAAAAA);
	background-color:@mynored;
	width:160px;
	height:120px;
}
@mycolor:rgba(25%,50%,100%,50%);

.myoriginal{
	background-color:@mycolor;
	width:80px;
	height:60px;
}

.myup{
	background-color:fadein(lighten(@mycolor,10%),25%);
	width:80px;
	height:60px;
}

.mydown{
	background-color:fadeout(darken(@mycolor,20%),25%);
	width:80px;
	height:60px;
}
.mygray{
	background-color:fade(greyscale(@mycolor,10%),%25);
	width:80px;
	height:60px;
}