Colorblindness

Colorblindness is one of Fallout GURPS disadvantages. See: Fallout GURPS.

Overview
"The player character is unable to see any colors, making any color-related tasks difficult."

- Steve Jackson Games GURPS sources

If chosen, the disadvantage would force the player to play in grayscale mode.

In Fallout
With the abandonment of GURPS, Colorblindness was removed from the game