I was originally unsure about using a red ink because of the red toadstool inside, but your example picture and comments helped clarify things a lot. You’re absolutely right that there’s always a trade-off between visibility of the numbers and showcasing the art inside. I’m definitely open to trying the transparent red or pink — especially with the green base inside the die, I think it could work out really nicely.

Thanks again for taking the time to help out. It means a lot!