These candy-coloured kitties are showing as part of an exhibition called Colour at the Michael Hoppen Contemporary gallery in that there London. I can't vouch for it (so don't go making a special journey then blame me if it's crap); I just liked the pusscats - I imagine them living with the late Dame Barbara Cartland on a fluffy pink cloud.
The blurb for the show gives the dictionary definition of the word colour ("that aspect of things that is caused by differing qualities of the light reflected or emitted by them, definable in terms of the observer or of the light") and the scientific description (hyperchromatism, wavelength, luminance, iridescence and purity). Look at them, getting in on my words act!
Pastel Cats by Tim Walker, courtesy Michael Hoppen Contemporary(on show in Colour until 9 Jan), C-type print, 20 x 30 inches