Writer Ingrid Sundberg has an interesting post here on some visual thesaurus charts she created to help people who have problems coming up with interesting color words.
Here's a screenshot of one of her charts:
I do something similar with my color reference notebook, although mine is less chart-worthy and more like a diary crossed with a backlist bible. I think color and how creative people describe it does tend to be very personal, so if you have your own ideas about how to create a color reference chart or book, definitely go for it. Or borrow Ingrid's and make up charts with your own descriptive word preferences.
(Article link swiped from Gerard at The Presurfer)