Trick or Treat from Del Sol when in natural light is a sheer orange jelly base packed with orange and holographic glitter. I mostly see the green particles from the holo glitter, and it looks awesome! The great thing about Del sol polishes if you didn't already know, is when you are exposed to UV light, i.e. the sun, the polish changes colour!
This one has got to be the most drastic I have seen from this brand. When in the sun, the base colour shifts to a deep dark purple/black jelly. The sun was out yesterday and while I was at my desk at work I put my hand close to the window and it started to change! I really love the look of the colour when in the sun. I wish it was more sunny lately!
I couldn't get the colour shift to photograph accuratley, it is actually quite darker than the picture displays.
I love each colour on its own and even the shift in between, definitely a must have for Halloween :)