js，php下 css颜色加深、减淡，css颜色递进的方法

1、js

var Color = function () {
    //将hex颜色值str转化成rgb数组
    this.HexToRgb = function (str) {
    var r = /^\#?[0-9a-f]{6}$/;
    //test方法检查在字符串中是否存在一个模式，如果存在则返回true，否则返回false
    if (!r.test(str)) return window.alert("输入错误的hex颜色值");
    //replace替换查找的到的字符串
    str = str.replace("#", "");
    //match得到查询数组
    var hxs = str.match(/../g);
    alert('bf'+hxs)
    for (var i = 0; i < 3; i++) hxs[i] = parseInt(hxs[i], 16);
    alert(parseInt(80, 16))
    return hxs;
}
//将rgb颜色值为a,b,c转化成hex颜色值
this.RgbToHex = function (a, b, c) {
    var r = /^\d{1,3}$/;
    if (!r.test(a) || !r.test(b) || !r.test(c)) return window.alert("输入错误的rgb颜色值");
    var hexs = [a.toString(16), b.toString(16), c.toString(16)];
    for (var i = 0; i < 3; i++) if (hexs[i].length == 1) hexs[i] = "0" + hexs[i];
    return "#" + hexs.join("");
}
//得到hex颜色值为color的加深颜色值，level为加深的程度，限0-1之间
this.getDarkColor = function (color, level) {
    var r = /^\#?[0-9a-f]{6}$/;
    if (!r.test(color)) return window.alert("输入错误的hex颜色值");
    var rgbc = this.HexToRgb(color);
    //floor 向下取整
    for (var i = 0; i < 3; i++) rgbc[i] = Math.floor(rgbc[i] * (1 - level));
    return this.RgbToHex(rgbc[0], rgbc[1], rgbc[2]);
}
//得到hex颜色值为color的减淡颜色值，level为减淡的程度，限0-1之间
this.getLightColor = function (color, level) {
    var r = /^\#?[0-9a-f]{6}$/;
    if (!r.test(color)) return window.alert("输入错误的hex颜色值");
    var rgbc = this.HexToRgb(color);
    for (var i = 0; i < 3; i++) rgbc[i] = Math.floor((255 - rgbc[i]) * level + rgbc[i]);
    return this.RgbToHex(rgbc[0], rgbc[1], rgbc[2]);
}
//得到hex颜色值为color的web安全色
this.getWebSafeColor = function (color) {
    var r = /^\#?[0-9a-f]{6}$/;
    if (!r.test(color)) return window.alert("输入错误的hex颜色值");
    var rgbc = this.HexToRgb(color);
    for (var i = 0; i < 3; i++) {
        var q1 = Math.floor(rgbc[i] / 51) * 51;
        //ceil向上取整
        var q2 = Math.ceil(rgbc[i] / 51) * 51;
        //abs绝对值
        if (Math.abs(q1 - rgbc[i]) <= Math.abs(q2 - rgbc[i])) rgbc[i] = q1;
        else rgbc[i] = q2;
    }
    return this.RgbToHex(rgbc[0], rgbc[1], rgbc[2]);
    }
}

//使用方法
insetpane("drakcolor", test.getDarkColor(v, 0.2));

 2、php

//hex颜色加深减淡
function changeColor($hex, $type='no'){
    if($hex < 0 || hexdec($hex) > hexdec('ffffff'))
    {
        $hex = DIY_COLOR;
    }
    $rgb = hexToRgb($hex);
    if($type=='+'){
        for ($i = 0; $i < 3; $i++) 
        {
            $re[$i] = floor((255 - $rgb[$i]) * DIY_COLOR_LEVEL + $rgb[$i]);
        }
        $re = rgbToHex($re);
    }elseif($type=='-'){
        for ($i = 0; $i < 3; $i++) 
        {
            $re[$i] = floor($rgb[$i] * (1 - DIY_COLOR_LEVEL));
        }
        $re = rgbToHex($re);
    }
    else{
        $re = $hex;
    }
    return $re;
}

//hex颜色转RGB
function hexToRgb($hex){
    $hex = str_replace('#', '', $hex);
    $rgb[0] = hexdec($hex[0].$hex[1]);
    $rgb[1] = hexdec($hex[2].$hex[3]);
    $rgb[2] = hexdec($hex[4].$hex[5]);
    return $rgb;
}
//RGB颜色转hex
function rgbToHex($rgb){
    return sprintf('%02x', $rgb[0]) . sprintf('%02x', $rgb[1]) . sprintf('%02x', $rgb[2]);
}