Go here and you will see what I mean.
http://rhscf.orgfree.com/
click on the links that say yellow-red, purple-blue, and others. The colors have numbers and not names
this is an example of how Maryott uses it. He doesn't use the RHS chart all the time but you will see it sometimes in his descriptions sometimes
Soft pink RHS 52A
You can give it a common color name also but you would then add the RHS number to it.