I have had in mind for a while this image and I decided to work with a secondary palette: Green, violet and orange. It really proved to be harder than what I originally thought, and I don’t know how well I did honor the secondary theme, but the final image has the energy I was looking for.
Comments and critiques, always welcome!

That puts my list down by two themes! Yay!
Palettes:
Monochrome
Complementary
Primary
Tertiary
Split complementary
Analogous
Multicolor
Warm
Cold
Composition:
Pyramidal
Spiral
Big group of people
Architecture
one point perspective
two points perspective