They look good. The larger one is just stressed out. I'm willing to bet that if you gave them some hiding places they would all look even better, especially the largest one. I know it's a QT tank but you really want to stress them as little as possible
My 4" EBDJ is beginning to regain some color.
Still in rehab. A little bit of parasite treatment, Warmer water,
Some aquarium salt, And 3 meals a day.
(beef heart, blood worms, And brine shrimp)
Showing color on the sides, Fins, And lips.