I don't know where this idea came up, but this is what I think that their favorite color would be. ( Mostly from their Among Us character)
Player: red.
Veteran: yellow and gold.
Captain: white.
Mr. Cheese: orange and yellow.
The Gentleman: black.
Gnome: lime green.
Engineer: purple.
Stoner: green.
Dum: Pink.
Mr. Egg: mainly maroon, but he also likes orange, pink, and white.
BDay: blue
Rose: light pink and purple.
Ninja: purple.
Bro: navy blue.