Existing civs of America:
Turquoise - Incas
Oil Green - Aztecs
Pale Orange - Mayans
Potential new civs:
Dark Green - Inuits - Inuit people
Orange - Iroquois - Irouqois Confederation, Cherokees etc.
Light Green - Mississippians - Mississippian Chiefdoms (approx.)
Dark Blue - Pueblos - Pueblo People (approx.)
Pink - Toltecs - Toltec Empire (overlapping territory with many civs)
Gray - Tarascans - Tarascan Empire
Yellow - Mixtecs - Mixtec Kingdom (overlapping territory with many civs)
Black - Zapotecs - Zapotec Kingdom (overlapping territory with many civs)
Red - Muiscas - Muisca Confederation, Sutagao, etc.
Teal - Caribs - Carib Chiefdoms (approx.)
Brown - Chimus - Chimu Kingdom
Purple - Chankas - Chanka Kingdom
Claret - Tupis - Tupi People (approx.)
Magenta - Mapuche - Mapuche People
Existing civs of Africa:
Oil Green - Saracens
Pale Orange - Ethiopians
Yellow - Berbers
Magenta - Malians
Potential new civs:
Light Green - Nubians - Alodia, Makuria, Nobatia Kingdoms
Purple - Somalis - Ajuran, Adal, Warsangali Sultanates
Pale Yellow - Sudanese - Daju, Funj Sultanates
Pale Red - Ugandans - Kitara Empire
Orange - Swahili - Zanzibar, Kilwa, Mombasa etc.
Teal - Malagasy - Merina Kingdom etc.
Light Blue - Zimbabweans - Butua Kingdom, Mutapa Empire, Great Zimbabwe
Dark Green - Kongolese - Kikongo Kingdom
Dark Blue - Kanembu - Kanem-Bornu Empire
Dark Gray - Hausa - The seven Hausa Kingdom (overlapping territory with many civs)
Claret - Mossi - Mossi Kingdom
Turquoise - Songhai - Songhai Empire, Gao Empire (overlapping territory with Malians)
Pink - Yoruba - Oyo Empire, Benin Empire
Grayish Brown - Igbo - Nri Kingdom
Light Gray - Akans - Denkyira (approx.)
Black - Ghanaians - Ghana Empire (overlapping territory with Malians)
Red - Vandals - Vandalic Kingdom
Brown - Senegal - Wolof Empire