cpp-face-light-name-list

cpp-face-light-name-list is a variable defined in `cpp.el'.
Its value is

("light gray" "light blue" "light cyan" "light yellow" "light pink" "pale green" "beige" "orange" "magenta" "violet" "medium purple" "turquoise")

Documentation:
Background colors useful with dark foreground colors.

You can customize this variable.