Colour Shift Chameleon Paints
We call them Colour Transition Paints but they are also known as Colour Shift, Chameleon or Colour Travel Paints.
Paints that change colour as the viewing angle changes.
The effect is often referred to as a Mother-of-pearl effect. Blue to Mauve gives natural mother-of-pearl colours.
See a short video that demonstrates the wonderful colour shift that these paints undergo: Watch
(Pictures do not capture the full beauty of these paints so the video is well worth a watch.)