First, the four brought over from Melee.
Green & Blue: New School Luigi
White & Green: Old School Luigi (NES colors from SMB1)
Blue and Blue: The Squigi
Pink and Red: PimpUigi
And now the two new colors for Brawl
Orange and Blue: CheezUigi
Purple and Blue: FunkUigi
I will keep this list updated and edited to reflect any changes.
Green & Blue: New School Luigi
White & Green: Old School Luigi (NES colors from SMB1)
Blue and Blue: The Squigi
Pink and Red: PimpUigi
And now the two new colors for Brawl
Orange and Blue: CheezUigi
Purple and Blue: FunkUigi
I will keep this list updated and edited to reflect any changes.