RColor class for Titanium. Taken from https://github.com/sterlingwes/RandomColor and slightly modified.

rcolor.js

function RColor() {
	this.hue			= Math.random();
	this.goldenRatio	= 0.618033988749895;
	this.hexwidth		= 2;
}

RColor.prototype.hsvToRgb = function (h,s,v) {
	var	h_i	= Math.floor(h*6),
	f	= h*6 - h_i,
	p	= v * (1-s),
	q	= v * (1-f*s),
	t	= v * (1-(1-f)*s),
	r	= 255,
	g	= 255,
	b	= 255;
	switch (h_i) {
		case 0:	r = v; g = t; b = p;	break;
		case 1:	r = q; g = v; b = p;	break;
		case 2:	r = p; g = v; b = t;	break;
		case 3:	r = p; g = q; b = v;	break;
		case 4: r = t; g = p; b = v;	break;
		case 5: r = v; g = p; b = q;	break;
	}
	return [Math.floor(r*256),Math.floor(g*256),Math.floor(b*256)];
};

RColor.prototype.padHex = function(str) {
	if (str.length > this.hexwidth){
		return str;
	}
	return new Array(this.hexwidth - str.length + 1).join('0') + str;
};

RColor.prototype.get = function(hex,saturation,value) {
	this.hue += this.goldenRatio;
	this.hue %= 1;
	if (typeof saturation !== "number") {
		saturation = 0.5;
	}
	if (typeof value !== "number") {
		value = 0.95;
	}
	var rgb = this.hsvToRgb(this.hue,saturation,value);
	if (hex) {
		return "#" +  this.padHex(rgb[0].toString(16)) +
		this.padHex(rgb[1].toString(16)) +
		this.padHex(rgb[2].toString(16));
	} else {
		return rgb;
	}
};

module.exports = RColor;