I ended up spreading my six layers across two cakes, since I didn't
achieve enough color distinction, and with my smaller diameter cake pan, I didn't want a toppling cake.
Not exact matches
If you don't see a dark
enough color, just keep adding drops until you
achieve the perfect shade.
Colors pop, edges are crisp and there's a good
enough dynamic range that I didn't always need to hop into HDR mode (though I did often to
achieve a certain look).