Unfortunately, color charts like like "A Mycological Colour Chart" by R. W. Rayner that are used for reference in identifying species are older and rare since they are out of print. Because of this it's difficult to find on the internet since few people have taken the time to upload and share it.

The best I would suggest is to see if your university library has access to an inter-library loan and request to borrow and take scans of it.

Thanks for your response Jonathan del Rosario

Hi, here are two colour cards, they are not from Rayner, but they have been helpful to me, I hope they are helpful to you too.

Thank you Lázaro Castro Hernández I will surely look into them.

Hey! I made this copy of Rayner myself, carefully matching each color to the printed version. I find it useful when I need to make descriptions and don't have the printed version on hand. I hope it can be helpful for you too!

Great! Thanks for sharing Gustavo Hernán Ramírez