When Knights of the Old Republic II: The Sith Lords was made, silver and viridian were added to the possible colors to choose from. In the case of Knights of the Old Republic, it added yellow, orange (Heart of the Guardian), and cyan (Mantle of the Force). In the case of lightsaber colors despite what George Lucas has established as what colors are available in the Star Wars Universe, games outside of his storyline tend to go towards directions of multiple colors that are outside the traditional blue, red, green, and purple for Mace Windu. Anytime we have a chance to choose from different color choices, we get happier for some reason. Humans typically as they grow into fully developed people develop their person color preferences. The more you can choose from, the better.