function buttonOnChange()
	{
		var color = new Color(this.value);

		self.values[this.index].setRGB(color.r, color.g, color.b);
		self.updateValues();

		if (self.onChange !== null)
		{
			self.onChange(self.values[this.index], this.index);
		}
	}
Update the buttos to match new values.

@method updateButtons