Big opacity:
This controls the opacity (transparency) of the large buttons, e.g. on the main menu.
Big colour:
The underlying colour of the main buttons.
Big text:
The colour of the text (not affected by opacity).
Button opacity:
Affects smaller buttons.
Button colour:
Affects smaller buttons.
Text unselected:
The colour of text on menus where highlighting occurs (e.g. options or garage).
Text selected:
The selected colour of text, as above.
Text unavailable:
Visible text that cannot be selected.
Text string:
Used on some buttons with user-editable text (like hostname or password), or for example for available but not yet completed training lessons.
Title colour:
The colour of the text in the top left of the menus. Also controls highlighting of fastest laps etc in race result lists.
Button green:
Shade for 'green' buttons.
Button red:
Shade for 'red' buttons.
Button alternate:
Shade for buttons used to indicate that pressing the button has no effect, or if an alternate third colour is needed. For example when going to the track selection screen, as long as you don't select a different track than currently loaded, the OK button will have this colour.
Small map light:
Colour of the small track map, when drawn against a most likely dark background (used for example at in-car view if the car has a roof).
Small map dark:
Colour of the small track map, when drawn against a most likely light background (used for example at in-car view if the car has no roof, or for the TV camera view)
Car 1 lap ahead:
Colour of a car more than one lap ahead (on the small track map).
Car ahead:
Colour of a car ahead of you.
AI ahead:
Colour of an AI car ahead of you.
Own car:
Colour of your own car.
AI behind:
Colour of an AI car behind you.
Car behind:
Colour of a car behind you.
Car 1 lap behind:
Colour of a car more than one lap behind you.
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