Sand color

[Don cheech]

Hey l am planning to set up for a pair of cacatuoides and wanted to know what would show off their colors more black or white sand

 

[MacZ]

Does not compute. Fish adapt to dark environments with dark colours and to bright environments with washed out bright colours, trying to blend in in any direction. So toss the idea of the colours having to look a certain way.
In their natural habitat most species encounter bright sand topped with a good layer of dark leaf litter. That's what I got here and the fish look good. Provide good conditions and the colours follow suit. The most important thing is their wellbeing. If that means they look brown and unconspicious, that's allright in my book.