White is not a good idea for dark rooms for the same reason your beige looks blah. As the article says, light colors need light to reflect in order to make them work in a room. That is actually the reason beiges and whites don't look good in dark rooms and instead look dreary and dirty and blah: because there is no light for them to reflect back into the room.
Dark colors absorb any available light, which is why dark colors aren't a good idea and will make a room like that look like a cave.
I think you want a room with a color with some depth..but not dark. I'd look at colors with an LRV range of 30 - 55 or so.
Personally I love blue bedrooms. there is something about waking up in a blue bedroom that works for me. And like I said, I changed my room from BM Quiet Moments to the SW Languid Blue (although I wish I'd gone with BM Van Courtland Blue), and the Languid Blue is stunning at night because it is so saturated with color.
Btw, that is not my room in the pic above. Got that off the Web just to show you the Languid Blue.
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LRV 30-55 for dark rooms
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