javascript计算渐变颜色的实例

function getItemColors (colorLevel) { var colors= []; //默认的最深颜色 var red = 134,green = 108, blue = 184; //最浅颜色是239,239,239 比如：最浅颜色的red是 239 则差值为239-134=105 var maxRed = 105,maxGreen = 131,maxBlue = 55; var level = colorLevel; while(level--) { colors.push( 'rgb('+red +','+green+','+blue+')'); red += parseInt(maxRed/colorLevel); green += parseInt(maxGreen/colorLevel); blue += parseInt(maxBlue/colorLevel); } return colors; }