Awhile ago I got 2 orange female guppies and a male black guppy. The females both died soon after they gave birth. Now all my guppies are thriving but some of the younger guppies who I assume are female have no vibrant color, they are more of a yellowish browning dull color. I know it takes awhile for guppy fry to get color but they seem like they are almost full grown. So my question is will they ever get a more vibrant color? And if they don’t, what “color” or strain are they considered.