thank you, it worked!
it's fun, but not easy!
it reminds me a bit of "Guess my RGB" by Susam: https://susam.net/myrgb.html
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Glad it worked - thanks for playing! =)
It is indeed hard, but I found it most enjoyable when asking for a certain precision. If you want, you can tune the difficulty either by the global settings or by editing the mode you play. I have myself quite some trouble playing the game since I have some difficulties with distinguishing red and green ;).
The idea of Guess My RGB is indeed related - but I'd say that through the absence of a preview of the input color it requires a quite good abstract understanding of the RGB color room - personally, I can only approach the correct solution by tuning the input according to the percentage that is returned =).