From the linked article: > “We definitely thought about colorblindness but ultimately there was not much we could do in terms of the individual puzzles,” the g

From the linked article: > “We definitely thought about colorblindness but ultimately there was not much we could do in terms of the individual puzzles,” the game’s lead developer, Jonathan Blow, told me today. It's been a decision by the devs. Still, it would be nice if they updated the puzzles for those who are colorblind.