Before Painting
Know that color is one of the most affordable expenses in interior design, so it is recommended to choose the sofa, furniture and carpets first, and only then paint the walls in a key that matches the interior elements. Remember, avoid the top mistakes!
It sounds strange, but that is why it is often not recommended to start with painting the walls, but rather with decorating.
Test color interaction
Try a smaller surface on the wall and match it with textiles in your room: carpets, curtains, sofa.
That way you can see best if and in which direction to change and how light affects the real look. In the case of adjacent rooms, the same color tone is usually preferred, but if combined well, the charm can be hidden in the contrast.