Cerulean = 26, 4.54, -24.55 (in L*A*B*)
I’m sure that every time you played with your Crayolas, you wondered what the the exact difference was in the spectra of green-yellow and yellow-green. Well I did.
Mark Meyer has done all of us a great service. He put a box of Crayolas under a spectrophotometer and published the results. He even has this nice PDF suitable for printing large and hanging on your wall so it’s handy next time you’re coloring.