A neutral work area to see true color
Where you color and cut, the walls and furniture behind the mirror should be neutral (white, light gray or beige). Bold colors reflect onto hair and skin and make it hard to see the true shade of a color job.
Lighting matters as much as paint
Use neutral white light with good color rendering (CRI of 90 or higher) at the stations. Very warm or very cool light changes how hair color looks. Your brand color can go in the reception area, on one wall or in the details.
Carry the palette through the whole experience
Appointment cards, capes, towels, bags and social media can all use the same colors. It doesn't have to cost much: a few towels and capes in your main color already make the salon look coordinated in photos.