I don't know of any cichlid from any part of the world that is in any way appropriate for a 5g tank.
If you want colour, you could do:
5 Endler's (male only - the females are too large, plus they'll reproduce)
-OR-
3 Endler's (again, male only) and 1 shrimp or 1 snail
-OR-
Another betta tank
-OR-
3 Sparkling/Pygmy Gourami and 1 shrimp or 1 snail
-OR-
1 Paradise Gourami and 1 shrimp or 1 snail
-OR-
5 freshwater Bumblebee Goby
If you want something more unusual, you could do:
1 freshwater Dwarf Puffer and 3 Otocinclus
-OR-
3 African Dwarf Frogs
NOTE: DPs, Otos, and ADFs can all be finicky eaters, and have special dietary needs. Some DPs and ADFs will only accept live food and/or need to be handfed. Many Otos will not accept supplemental foods, and if you cannot grow enough algae, they will starve. DO NOT get them if you are not prepared to meet these needs.