For yellow one a frozen mix of beefheart + spinach. and the orange one same plus a red color enhancing food Tetra RedParrot.
I raised them both since they were a 2" ugly black/orange fish.
spinach has a great effect on yellow color. but you shouldn't use any pellet that enhances the red color. most of the pellets do it less or more.
my female tiger oscar had a shining yellow from the spinach but she lost it as soon as I started Hikari gold and bio-gold. it turns into a simple orange.
for spinach you can boil it for 1-2 minutes and add it to the frozen recipe.