*bump*
"Color - A Natural History of the Palette" by Victoria Finlay.
A truly fascinating history of the major colors (black, white, red, orange, etc.).
Finlay travels the world to seek out the places where the pigments & dyes originated, in the hope that she can find them still being produced. The chapter that most impressed me was Blue. She went into Taliban-controlled Afghanistan, and trekked over mountains to get to the lapis lazuli mines (the vivid blue stone is used to make the pigment ultramarine), where she was the first woman to visit in six months. She also got to climb on the top of one of those Buhdda statues that were subsequently destroyed to see one of the oldest examples of ultramarine paint.
Oh, you can taunt your vegan friends by letting them know that one of the most widely used red pigments (Color Additive E120, which is used in Cherry Coke, for one) comes from crushed beetles.
Lots of wonderful anecdotes, and the photo section is - of course - in color.
rtpoe