Function _rgb2hex

pattern/canvas.js:750–760

(r, g, b)

// Based on: http://www.easyrgb.com/math.php

function _rgb2hex(r, g, b) {
    /* Converts the given R,G,B values to a hexadecimal color string.
     */
    parseHex = function(i) { 
        return ((i == 0)? "00" : (i.length < 2)? "0"+i : i).toString(16).toUpperCase(); 
    }
    return "#"
        + parseHex(Math.round(r * 255)) 
        + parseHex(Math.round(g * 255)) 
        + parseHex(Math.round(b * 255));
}

function _hex2rgb(hex) {
    /* Converts the given hexadecimal color string to R,G,B (between 0.0-1.0).