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function RGB2Hex(rgb){var re = rgb.replace(/(?:\(|\)|rgb|RGB)*/g,"").split(",");//利用正则表达式去掉多余的部分var hexColor = "#";var hex = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'];for (var i = 0; i < 3; i++) {var r = null;var c = re[i];var hexAr = [];while (c > 16) {r = c % 16;c = (c / 16) >> 0;hexAr.push(hex[r]);}hexAr.push(hex[c]);hexColor += hexAr.reverse().join('');}return hexColor;}