RGB颜色深浅变化
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><TITLE> New Document </TITLE><META NAME="Generator" CONTENT="EditPlus"><META NAME="Author" CONTENT=""><META NAME="Keywords" CONTENT=""><META NAME="Description" CONTENT=""><style type="text/css">.color_div {width: 10px;height: 20px;margin: 1px;float: left;}</style></HEAD><SCRIPT LANGUAGE="JavaScript"><!--for (var i = 0; i < 255; i+=5) {document.write("<div class='color_div' style='background-color: rgb("+i+","+i+","+i+");'></div>");}document.write("<div style='clear: both;'></div>");for (var i = 0; i < 255; i+=5) {document.write("<div class='color_div' style='background-color: rgb(255,"+i+","+i+");'></div>");}document.write("<div style='clear: both;'></div>");for (var i = 0; i < 255; i+=5) {document.write("<div class='color_div' style='background-color: rgb("+i+",255,"+i+");'></div>");}document.write("<div style='clear: both;'></div>");for (var i = 0; i < 255; i+=5) {document.write("<div class='color_div' style='background-color: rgb("+i+","+i+",255);'></div>");}//--></SCRIPT></BODY></HTML>