try a variety of grays, light medium and darks.. black stands out even at night or rather especially at night.
depending on the setting, grays and sparing neon colors could work, think Coruscant where everything is lit up with neon signage 24/7.
while that could work in-universe it will look awkward everywhere else, better to just adapt Mandalorian Protector colors, or a mix of dark colors.
hot rod red might work on a lava planet or a planet orbiting a red sun, possibly a planet with a lot of red plant base/ earth/ rocks.
but since you won't be walking around with a portable backdrop it will look funky here on Dirt...Crud...Earth .. whatever this planet is called.