I fully understand the concept. I played through one game quickly.

However, in this game, it's impossible. Am I missing a color? Showing 7. There is no possible combination that fits what it's telling me.

You should try using one color twice, like two reds; two blues; and so on. I usually do four reds, then four yellows, etc. etc. to get an idea of how many of each color is needed.

YOU CAN DO MORE THAN ONE OF EACH COLOR? Welp, this can be locked.