获取颜色值转换为十六进制

/**
	 * [parserColor 颜色转换为十六进制]
	 * @param  {[String]} value [需要转换的颜色值]
	 * @return {[String]}       [返回转换后的颜色值,#0000FF形式]
	 */
	function parserColor(value){
		var str="",
		ar=[],
		arri= "",
		i=0,
		vlen=value.length,
		colorObj={
			"black":"000000",
			"red":"0000FF",
			"blue":"FF0000",
			"white":"FFFFFF",
			"yellow":"FFFF00",
			"orange":"FFA500"
		};
		//rgb(0,0,255)
		if(/rgb/.test(value)){
			arr = value.match(/\d+/g);
			vlen = arr.length;
			for(; i < vlen ; i++){
				arri = parseInt(arr[i]);
				//转换为十六进制
				str += arri < 10 ? "0" + arri.toString(16) : arri.toString(16);
			}
		}else if(/^#/.test(value)){
			//#00f
			if(vlen == 4){
				str = value.replace(/[A-Za-z0-9]/g,"$&$&");
			}else if(vlen == 7){
				//#FF0000
				str = value.replace(/^#([A-Za-z0-9]*)/,"$1");
			}else{
				str = "FFFFFF";
			}
		}else{
			//red/orange
			value = value.toLowerCase();
			str = colorObj[value] ? colorObj[value] : "FFFFFF";//不匹配默认为白色
		}
		return "#" + str.toUpperCase();
	}

三、实例：

	console.log(parserColor("white"));//#FFFFFFF
	console.log(parserColor("#00f"));//#0000FF
	console.log(parserColor("rgb(0,0,255)"));//#0000FF

转载请尊重原创，注明出处Benjamin——前端攻城师，本页地址http://blog.youkuaiyun.com/cuew1987/article/details/17679033，谢谢！