Using food to change the color of my hissers?

[Entomology_and_herpetology]

I have ten nymphs that were pretty colorful when I bought them but they have darkened to almost solid black. I read somewhere that different foods can impact their colors as nymphs. What is a good staple diet that would produce colorful hissers? I use mainly carrots, apples, oranges, and fish food as their current staple diet. 

 

[kawaiiroaches]

The fish food could be darkening their color, but full black hissers are pretty rare as some gene mutations make them ebony. Hissers seem to have somewhat of a random genetic lineup from what I understand, especially if they’re mixed.

Experiment with different fruits and veggies and dry puppy food, see what you get. My roaches love oranges, carrots, pineapple, and strawberries.