Online Color Thesaurus

HP has an online color thesaurus which does a couple of neat things when you search the name of a color, like blue:



Aside from the helpfulness of providing those color codes, it shows you a swatch of the color, four close matches, and four that are opposing.

This color searcher could be particularly useful when you need to see the color that goes with the word, like chestnut:



Or celadon:



You can also find out if what you think the color looks like is correct; I've always assumed citron meant strong/citrusy-yellow with a slight greenish tinge, when HP tells me it's actually strong citrusy-green with a slight yellow tinge: