Generally speaking, a good vastu colour for a bedroom is not dark like black, dark brown, charcoal grey, or navy blue. It usually falls on the lighter end of the spectrum, which is also the best colour for bedroom walls for smaller bedrooms which need bedroom wall colours that make the room look bigger and brighter.
Then which colour would be considered as a good vastu colour for bedroom? Colours like beige, off-white, and pearl white, or other light pastel colours like pink, blue, and yellow are good contenders for the best vastu colour for the bedroom.