without pictures i could tell you something but it could be wayyyyyyy off... just from the basic colors and the most common species Id say...
yellow- Labidochromis Caeruleus - Yellow Lab
Orange- Metriaclima Estherae- Red Zebra
White/blue stripes-????? maybe light blue with black stripes???? if so.... Pseudotropheus Lombarodi- Kenyi
look these names up and compare pictures with what you have. hopefully I gave you a head in the right direction... theres a few thousand different species of Cichlid... around 1200 in Lake Malawi alone... so you see why it could be difficult... these 3 can usually be found in any chain or local pet store so only natural they would be my first guesses