I found the same with my birdsnest and other red corals, like my reverse superman turned orange under my ilumina. I added a actinic and fiji purple to supplement and bang colors came back!
Im hoping the mitras coming will be a big step forward with the colors it has, just saw this morning the LEDs in it.
12 x Cree XP-E blue
12 x Cree XT-E cool white
12 x Cree XT-E royal blue
6 x Cree XT-E neutral white
6 x Osram Oslon SSL true green
6 x Osram Oslon SSL yellow
6 x Osram Oslon SSL red
6 x Osram Oslon SSL hyperred
6 x hyper violet 425 nm