I built a daily color guessing game. You're shown RGB values like (147, 83, 211) and try to pick what color that actually is.

  The scoring uses Euclidean distance in RGB space. New color every day.                                                                                                                                             
                                                                                                                                                                                                                     
  I was curious how well people can mentally convert RGB values to colors - turns out it's surprisingly hard, even for those of us who work with colors regularly.