Something I hadn’t known: Apparently there are a large number of named colors that most web sites will recognize. Web colors - Wikipedia
Blue
Olive
Teal
Navy
Magenta
LIME
Lavender
Chocolate
Puce
That is not Puce.
Puce
That is not puce either.
There may be a lot more than that.
Here’s a list of 500 named colors, including their RGB codes in hex and decimal.
ETA: Okay, on closer reading, he says that these color names can’t be used in HTML (which I assume means that some of them can’t be used), but here is another similar page with named colors that he says you can use.
I have an older edition of Dynamic HTML: The Definitive Reference (O’Reilly) that has a four-page table listing about 145 color names, that supposedly can all be used.