Don't run to me. Go to Nicalandia, Sneebsey, or the Moonshiner. I'm good on the basics, and understanding why the basics work, but some of the gene interactions are beyond me since I don't have a ton of colour-gene variety in my flock and haven't seen the results firsthand.Also, chicken genes still confuse the heck out of me so now I know who to run to.
The quail color calculator I found to be about 75% correct, 25% incorrect (when compared to what research studies have to say about the genetic mechanisms), and visually confusing, so I haven't been able to use it much as a resource personally.
BUT I also have a mind for punnet squares, so it's not a big hindrance. If anyone is going to use it I would say use it only for one gene at a time and just do some follow-up research to see if what you find is consistent. It's definitely sometimes right! That's just somehow even less helpful than always being wrong .
I had it in my mind to do an updated version a while back, and quickly realized it would be impossible, so kudos to the original creator for getting that far!