the first used a hard pink, light pink and white. The white colored words can be outstanding and gives effect to the center gem. Used monochromatic. 

the second one used yellow, light pink, and white. The yellow part is to get the audiences' attention so they know who is performing. the white part in the gem is like a reflection on the gem. used compound.

the third one used light blue gradient, purple and white. the white is on the words, the light blue gradient is gem show that they are the jewels and the purple is the solid gem background. used analogous. 

the boby used lacquer. it gives a feeling of not dry. a bit wet, moisture, as it can be seen that the words are like water linking down. the title used century Gothic easy tobe read.