Scratch

Name: 6-colour/3-bit
Colors: Red, Greeny-yellow, Blue, Gold, White and Black.
How is Purple made: Red and Blue.
How is Yellow made: Greeny-yellow and Gold.
How is Magenta made: Red, blue and white.
How is Grey made: Black and White.
How is brown made: Orange, Greeny-yellow and Black.

Name: 6-colour #2/3.5bit
Colors: Red, Yellow, Green, Blue, Black and White.
How is Purple made: Red and Blue.
How is Gold made: Red, Yellow and White.
How is Orange made: Red and Yellow.
How is Grey made: Black and White.
How is Yellowey-Green made: Yellow and Green.

Mixes = Checker, e.g. checker Black with White.