They start out mostly green with blue pearling. The main base for these hybrids is either a Green Texas or Carpinitus cichlid which is then bred with any number of "redfish" such as Bloodparrot, Rose Queen, Midas or Red Devil cichlids, and then crossed back to the base specie's. Now all of these "redfish" have 1 thing in common which is the Fader Gene. All this fader gene does is remove some - all of the natural body pigment.
The way I like to think about it is to think about how ya paint a house, ya paint it white before adding a secondary color over top of it. All the fader gene does in this sense is it removes the top layer of color leaving behind only the bottom layer.
So when it comes to the Red Texas, it's base color is red and white while it gets the blue and green layers over top of the red and white, green over red and blue over white. Then when the fader gene becomes active it removes some - all of the blue and green color from the fish leaving behind only the red and white base colors.