Etymology of pink
http://www.merriam-webster.com/dictionary/pink has the flower (and several other meanings) under a different etyomology from the colour, whereas we have them under the same. I don't know myself which is right, but I'd be more inclined to believe M-W.
- Actually, MW doesn't seem to give any etymology for the colour sense so it's not clear whether they think it's distinct or not. But the OED and two dictionaries of etymology in front of me all say it's the same word, and the colour is originally used in the sense of "the colour associated with the flower". Ƿidsiþ 05:35, 29 May 2010 (UTC)