今天做组织机构,要分级别显示颜色,自己计算半天也没算出颜色渐变的方法,出来总是花里胡哨的难看的不要不要的,所以查了一下,找到一个js代码,试了试,很完美哦!
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script src="js/jquery-1.11.3.js"></script>
<script src="js/swiper-3.3.1.jquery.min.js"></script>
<script type="text/javascript">
/*
// startColor:开始颜色hex
// endColor:结束颜色hex
// step:几个阶级(几步)
*/
function gradientColor(startColor,endColor,step){
startRGB = this.colorRgb(startColor);//转换为rgb数组模式
startR = startRGB[0];
startG = startRGB[1];
startB = startRGB[2]; endRGB = this.colorRgb(endColor);
endR = endRGB[0];
endG = endRGB[1];
endB = endRGB[2]; sR = (endR-startR)/step;//总差值
sG = (endG-startG)/step;
sB = (endB-startB)/step; var colorArr = [];
for(var i=0;i<step;i++){
//计算每一步的hex值
var hex = this.colorHex('rgb('+parseInt((sR*i+startR))+','+parseInt((sG*i+startG))+','+parseInt((sB*i+startB))+')');
colorArr.push(hex);
}
return colorArr;
} // 将hex表示方式转换为rgb表示方式(这里返回rgb数组模式)
gradientColor.prototype.colorRgb = function(sColor){
var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;
var sColor = sColor.toLowerCase();
if(sColor && reg.test(sColor)){
if(sColor.length === 4){
var sColorNew = "#";
for(var i=1; i<4; i+=1){
sColorNew += sColor.slice(i,i+1).concat(sColor.slice(i,i+1));
}
sColor = sColorNew;
}
//处理六位的颜色值
var sColorChange = [];
for(var i=1; i<7; i+=2){
sColorChange.push(parseInt("0x"+sColor.slice(i,i+2)));
}
return sColorChange;
}else{
return sColor;
}
}; // 将rgb表示方式转换为hex表示方式
gradientColor.prototype.colorHex = function(rgb){
var _this = rgb;
var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;
if(/^(rgb|RGB)/.test(_this)){
var aColor = _this.replace(/(?:(|)|rgb|RGB)*/g,"").split(",");
var strHex = "#";
for(var i=0; i<aColor.length; i++){
var hex = Number(aColor[i]).toString(16);
hex = hex<10 ? 0+''+hex :hex;// 保证每个rgb的值为2位
if(hex === "0"){
hex += hex;
}
strHex += hex;
}
if(strHex.length !== 7){
strHex = _this;
}
return strHex;
}else if(reg.test(_this)){
var aNum = _this.replace(/#/,"").split("");
if(aNum.length === 6){
return _this;
}else if(aNum.length === 3){
var numHex = "#";
for(var i=0; i<aNum.length; i+=1){
numHex += (aNum[i]+aNum[i]);
}
return numHex;
}
}else{
return _this;
}
}
var gradient = new gradientColor('#e82400','#8ae800',10);
console.log(gradient);//控制台输出
alert(gradient);
for(var i=0;i<gradient.length;i++){
var htmls='<div class="mmm'+i+'">'+i+'</div>';
$("body").append(htmls);
console.log($("mmm"+i));
console.log(gradient[i]);
$(".mmm"+i).css("background-color",gradient[i]);
} </script>
</body>
</html>
再附上一个颜色代码对应表http://www.360doc.com/content/13/1120/12/14695328_330723062.shtml