Question

I have color code like 0xff3a9bda, 0xff73bbf3. I really don’t know about this color type as I know that these are NOT RGB, aRGB, HSB, or HEX.

As I am working on web application, my problem is, I can get color code with JavaScript in RGB and HTML color code for any color and I want to convert this color to above specified color type code.

Could anybody please give me an idea or soluton for this?

Answer 1

Are you sure this isn’t RGBA ?

0xff3a9bda would be rgba(255,58,155,0.85) (RGBA) or rgba(58,155,218,1) (ARGB)

You can do the conversion like this:

var c = 0xff3a9bda;
var r = (c & (0xff << 24)) >>> 24;
var g = (c & (0xff << 16)) >>> 16;
var b = (c & (0xff << 8)) >>> 8;
var a = (c & 0xff) / 0xff;
var rgba = 'rgba(' + [r,g,b,a].join(',') + ')';

Or like this:

var c = 0xff3a9bda;
var a = ((c & (0xff << 24)) >>> 24) / 0xff;
var r = (c & (0xff << 16)) >>> 16;
var g = (c & (0xff << 8)) >>> 8;
var b = c & 0xff;
var rgba = 'rgba(' + [r,g,b,a].join(',') + ')';

Try here: http://jsfiddle.net/gX6ds/1/

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Convert #RRGGBB to this format:

var rgb = 'AABBCC';
var c = 0xff000000 + parseInt(rgb, 16);
alert('0x' + c.toString(16));

Convert R, G, B values to this format:

var R = 0xAA, G = 0xBB, B = 0xCC;
var c = 0xff000000 + (R << 16) + (G << 8) + B;
alert('0x' + c.toString(16));