Well to give you an example of how safe you're probably going to be, my 4" Male Chocolate gets bullied up by my little Keyholes 
The drab colours work if you've got a natural tank, they're a really beautiful fish in my opinion. Be sure to provide plenty of cover from the lights as mine spends most of it's time hiding on a 45 degree angle under wood looking at the surface, you'll see there colours improve when they're in the shade as I'm presuming it's much more natural for them. Mines still quite small but he turns quite pale when hes out in the open begging for food, then goes to his usual garb when eating and returning to 'sentry' for bugs.
They're also funny fish and when they're small they can camoflage extremely well. They certainly interact with you and have a distinct character. Sometimes I have to point him out to people looking for him
The drab colours work if you've got a natural tank, they're a really beautiful fish in my opinion. Be sure to provide plenty of cover from the lights as mine spends most of it's time hiding on a 45 degree angle under wood looking at the surface, you'll see there colours improve when they're in the shade as I'm presuming it's much more natural for them. Mines still quite small but he turns quite pale when hes out in the open begging for food, then goes to his usual garb when eating and returning to 'sentry' for bugs.
They're also funny fish and when they're small they can camoflage extremely well. They certainly interact with you and have a distinct character. Sometimes I have to point him out to people looking for him