it's the white balance that went off a little it ajust itself(or you adjust it in manual mode) according to the room's lightning, usually indoor lighning got a lower color temp so the whites appear yellowish, at the opposite sun lightning or more powerful spots got gives a blue-ish color to whites(higher color temp)

in order to give the most accurate color, the camera give a yellow-ish or blue-ish filter to counter this, in your pic it misjudged and gave a too much yellow filter, so cya + yellow = purple

even if it's not the real color, it gives a warm look to your picture, wich is pretty cool for such an intimate close up

Thanks for the info, I'll fiddle with the camera and see if there is a way to override that. If there is I probably won't figure it out, oh well. I'm much more familiar with film not that we really run the dark room these days, though we should...

oh it's not a problem with your camera, every camera from 100$ to 1500$ would do this once in a while, it's an automated system that try to judge something that even your eyes might not see