Convert string to hex code

toHexColour.js

// Hash any string into an integer value
// Then we'll use the int and convert to hex.
function hashCode(str) {
    var hash = 0;
    for (var i = 0; i < str.length; i++) {
        hash = str.charCodeAt(i) + ((hash << 5) - hash);
    }
    return hash;
}

// Convert an int to hexadecimal with a max length
// of six characters.
function intToARGB(i) {
    var hex = ((i>>24)&0xFF).toString(16) +
            ((i>>16)&0xFF).toString(16) +
            ((i>>8)&0xFF).toString(16) +
            (i&0xFF).toString(16);
    // Sometimes the string returned will be too short so we 
    // add zeros to pad it out, which later get removed if
    // the length is greater than six.
    hex += '000000';
    return hex.substring(0, 6);
}

// Extend the string type to allow converting to hex for quick access.
function toHexColour(str) {
    return intToARGB(hashCode(str));
}

// toHexColour("foo") => "018cc6"