White wall, pale yellow floor, gray sofa, light green background wall with what color

No, the interior decoration is generally done according to personal preferences, as long as it is not the difference in color contrast is particularly strong is acceptable, therefore, the colors you said, pale yellow walls, white furniture, gray floors I think it is acceptable to match, but you also need to consider the future of hygiene.

Fart upstairs,. Don't talk nonsense if you don't understand the furniture is made of beige simple French furniture, the countertop is light coffee color, and the cabinets are bright white

I think it can be matched with a color that is too much with the white walls and furniture. It doesn't seem very jumpy. For example, light gray sofa covers can also have some bright colors on them, so that they are not very rigid.

It is recommended that beige contrast with the background wall and the floor heal warm and harmonious.

The floor tiles and the back wall have patterns, so it is recommended to use solid colors for wall paper and curtains, and white or light colors for wallpaper. >>>More