[255,204,204] Just hit the numbers on a calculator. 255*.8=204. This works well for numbers under a value of 1 or floating point stuff. If the values are over 1 (as in the case with [1 4 1]) use something like this. 255/4=63.75 which I rounded to 64 (when I put it into marmoset it put it as 65, though I don't know why.…