I would say mbuna cichlids, all male peacock tank or EBJD have some vibrant color. If you looking for a really colorful tank with all different color I would say refer to the first two I suggested..
First off, cichlids that are breeding pairs tend to have the best colors. But here is my list.
1. Ornatum
2. Festae
3. EBJD
4. Green Terror
5. Synspillum
6. Bocourti
7. Super Red Severum
8. Red Texas
9. H. Turqoise
10. Jack Dempsey
11. Bifa
12. Zonatus