It’s best that you keep your walls subtle. It’s tasteful, understated & classical. These can be creams, pale yellows & greens, pale melon, or other pastels. Be sure you go for an off-white or cream & definitely avoid extreme stark bleached white (unless you want the antiseptic feel of medical rooms or a hospital).
Be careful using colors that are too dark, or too strong – you should tread carefully with dark browns, dark reds & dark greens – they can overpower a room & make it seem daunting, uncomfortable, unrelaxing & even claustrophobic.