I like when someone does something like this. It starts with something simple and self worthy, but this is handy to a lot of people who have trouble with colours, sometimes majorly so.
Good Job

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"The very existence of flamethrowers proves that sometime, somewhere, someone said to themselves, “You know, I want to set those people over there on fire, but I’m just not close enough to get the job done.”
-George Carlin

I love it.

Very elegant and compact solution, thank you!