John Bragg

Is there any method to the numbering system with the 160 piece set, that would help me pick good colors for blending at a glance?

For example, I have a few Copics, and their numbers use family/saturation/intensity, so I know that an R27 is from Red family, is 80/20 red/gray, and 70% intensity.

I looked at the color chart for the Ohuhu, but haven’t been able to make sense of it. Sometimes it seems there’s a method, but then some just seem random.

Can someone help me decode these numbers? Or at least confirm whether or not they even give any information about the color?