Get a color component from an rgb string in Javascript?

Question

NOTE - We're all on board with the regex ate my brains and kicked my dog attitude, but the regex version just seems the better method. My opinion. Check it out.

Non-regex method:

var rgb = 'rgb(200, 12, 53)';

rgb = rgb.substring(4, rgb.length-1)
         .replace(/ /g, '')
         .split(',');

console.log(rgb);

http://jsfiddle.net/userdude/Fg9Ba/

Outputs:

["200", "12", "53"]

Or... A really simple regex:

EDIT: Ooops, had an i in the regex for some reason.

var rgb = 'rgb(200, 12, 53)';

rgb = rgb.replace(/[^\d,]/g, '').split(',');

console.log(rgb);

http://jsfiddle.net/userdude/Fg9Ba/2

much simpler way ..

    var rgb = 'rgb(200, 12, 53)'.match(/\d+/g);
    console.log(rgb);  

and here comes the output as

    ["200", "12", "53"]

" simple is always beautiful ! " :)

My version takes a HEX, RGB or RGBa string as an argument, uses no regEx, and returns an object with red, green, and blue (and alpha for RGBa) number-values.

var RGBvalues = (function() {

    var _hex2dec = function(v) {
        return parseInt(v, 16)
    };

    var _splitHEX = function(hex) {
        var c;
        if (hex.length === 4) {
            c = (hex.replace('#','')).split('');
            return {
                r: _hex2dec((c[0] + c[0])),
                g: _hex2dec((c[1] + c[1])),
                b: _hex2dec((c[2] + c[2]))
            };
        } else {
             return {
                r: _hex2dec(hex.slice(1,3)),
                g: _hex2dec(hex.slice(3,5)),
                b: _hex2dec(hex.slice(5))
            };
        }
    };

    var _splitRGB = function(rgb) {
        var c = (rgb.slice(rgb.indexOf('(')+1, rgb.indexOf(')'))).split(',');
        var flag = false, obj;
        c = c.map(function(n,i) {
            return (i !== 3) ? parseInt(n, 10) : flag = true, parseFloat(n);
        });
        obj = {
            r: c[0],
            g: c[1],
            b: c[2]
        };
        if (flag) obj.a = c[3];
        return obj;
    };

    var color = function(col) {
        var slc = col.slice(0,1);
        if (slc === '#') {
            return _splitHEX(col);
        } else if (slc.toLowerCase() === 'r') {
            return _splitRGB(col);
        } else {
            console.log('!Ooops! RGBvalues.color('+col+') : HEX, RGB, or RGBa strings only');
        }
    };

    return {
        color: color
    };
}());

console.debug(RGBvalues.color('rgb(52, 86, 120)'));
  //-> { r: 52, g: 86, b: 120 }
console.debug(RGBvalues.color('#345678'));
  //-> { r: 52, g: 86, b: 120 }
console.debug(RGBvalues.color('rgba(52, 86, 120, 0.67)'));
  //-> { r: 52, g: 86, b: 120, a: 0.67 }
console.debug(RGBvalues.color('#357'));
  //-> { r: 51, g: 85, b: 119 }

Might be useful to someone. :)

How about using a color library like the xolor library:

xolor("rgb(200,100,40)").r // returns the red part