Hm... I get the blue hue when I set a number of colours to 4 or 5, while accuracy is set to 1 or 2. Still, you are right, the "accuracy" is not even a correct label here. This slider was in fact introduced for performance reasons, as I've been getting colours from images which were >10MB. Higher values on that slider will cause more calculation time, but still, would not certainly guarantee better accuracy. I'll probably rename it and provide the explanation. So thanks!
Seems to be interesting but some more information on the "about" could help us to understand how are colors selected and how the "accuracy" can change the results.
[1] http://www.fatosdesconhecidos.com.br/wp-content/uploads/2015...