I ran across a table of settings for Photoshop’s channel mixer for simulating various analog film stocks. However, the RGB color values are given as numbers in the 0-255 range, and channel mixer uses percentages. Any idea how to convert the RGB values to plug them into channel mixer?
If I’m understanding you correctly, I’ll use the variables C for Channel (R, G, or B), and P for Percentage…
P = C / 2.55
C = P * 2.55