I've seen photo essay-like posts showing white or pale-colored fish turning colors. I chose Boris not for his color but because I feared he was dying. Now that he's healthy (I think), I'm wondering if he'll change colors. His fins and tail have been filling in so well. They flash iridescent green and purple when the light hits them. I don't know if that informs what he'll look like in future. Do you? Before I saw Boris at PetSmart, I was going to find a blue mustard betta. I think they're amazing. But I don't much care what Boris eventually displays, or if he stays white with charcoal fins & tail. I'm just really curious about bettas and how they get colors.