Convert Hex to RGBA

Question

My fiddle - http://jsbin.com/pitu/1/edit

I wanted to try an easy hex to rgba conversion. Ever browser I\'ve used renders colors using rgb as default so when using th

Answer 1

Convert HEX with alpha (ahex) in to rgba.

function ahex_to_rba(ahex) {
    //clean #
    ahex = ahex.substring(1, ahex.length);
    ahex = ahex.split('');

    var r = ahex[0] + ahex[0],
        g = ahex[1] + ahex[1],
        b = ahex[2] + ahex[2],
        a = ahex[3] + ahex[3];

    if (ahex.length >= 6) {
        r = ahex[0] + ahex[1];
        g = ahex[2] + ahex[3];
        b = ahex[4] + ahex[5];
        a = ahex[6] + (ahex[7] ? ahex[7] : ahex[6]);
    }

    var int_r = parseInt(r, 16),
        int_g = parseInt(g, 16),
        int_b = parseInt(b, 16),
        int_a = parseInt(a, 16);


    int_a = int_a / 255;

    if (int_a < 1 && int_a > 0) int_a = int_a.toFixed(2);

    if (int_a || int_a === 0)
        return 'rgba('+int_r+', '+int_g+', '+int_b+', '+int_a+')';
    return 'rgb('+int_r+', '+int_g+', '+int_b+')';
}

Try it yourself with snippet:

function ahex_to_rba(ahex) {
    //clean #
    ahex = ahex.substring(1, ahex.length);
    ahex = ahex.split('');

    var r = ahex[0] + ahex[0],
        g = ahex[1] + ahex[1],
        b = ahex[2] + ahex[2],
        a = ahex[3] + ahex[3];

    if (ahex.length >= 6) {
        r = ahex[0] + ahex[1];
        g = ahex[2] + ahex[3];
        b = ahex[4] + ahex[5];
        a = ahex[6] + (ahex[7] ? ahex[7] : ahex[6]);
    }

    var int_r = parseInt(r, 16),
        int_g = parseInt(g, 16),
        int_b = parseInt(b, 16),
        int_a = parseInt(a, 16);


    int_a = int_a / 255;

    if (int_a < 1 && int_a > 0) int_a = int_a.toFixed(2);

    if (int_a || int_a === 0)
        return 'rgba('+int_r+', '+int_g+', '+int_b+', '+int_a+')';
    return 'rgb('+int_r+', '+int_g+', '+int_b+')';
}


$(function() {
  $('#go').click(function() {
    $('p b').text(ahex_to_rba($('#hex').val()));
  })
});

Result: 

Original Author