Coloris is an Amiga puzzle game released in 1990 by Avesoft. The game is a clone of the arcade game Columns. The game was going to be converted to the Commodore 64 around the same year, but supposedly a fear of legal action was inside the minds of Avesoft as the Amiga version was only released in Finland, likely meaning the C64 version was cancelled before it can even be completed.
Jukka Tapanimaki had a disk which contained a single screenshot from the C64 version, but nothing else. Jeroen Tel's tune for the game has been around for a long time however.