I painted two coats of DTM and two coats of 505. Note that there wasn't much of a difference in intensity between one and two coats, so if you do a thick coat, you can get away with one and save the precious polish...
I didn't take a picture of DTM by itself, but Vampy Varnish has a good swatch.
teal flash of Don't Tell Mama
Blue to purple shift of Don't Tell Mama
*excuse my abused cuticles!!*
Besides teal, blue and purple, this polish also shifts from a blazing emerald to reddish bronze. I couldn't get good pictures of the last two, so here is a great comparison of all the colours!