It's an Oric picture with the usual constraints:
- 240x200
- 8 possible colors (pure RGB ones)
- color changes are done by putting serial attributes in the picture itself (ie: you either change the color or have graphics).

If you are interested, here is the complete description of the video mode used:
- http://www.defence-force.org/download/colors_on_oric-english.txt

Looks great considering it's only RGB+CMY+BW. I think it could have looked better if you mixed some magenta in some of the red parts.