Any bright colour that is great at reflecting light can make a room look brighter. Unlike dark colours that absorb light, colours like white, beige, and light grey reflect light all over the room, making it look bigger than it actually is.
That is why choosing calming paint colours for bedroom walls keeps your room looking energetic and reviving.
Apart from neutral, if you want a more colourful palette that still offers brightness, then pastel colours are your go-to.
The pastel blues, greens, pinks, and yellows are common in most modern room designs as they form the perfect middle ground for neutrals and pop colours.