This bachelor thesis serves the purpose of differentiating surface treatment for wood and wood-aluminum windows in interior. in the experimental part of the work were eight spruce patterns with different tinting of the Surface treatment observed using the company Makrowin G.m.b.H. Four of the patterns were only suitable for wooden windows and four exclusively for wood-aluminum windows. The color was measured in CIE L * a * b * and the color differencewas evaluated. The results showed that the color difference of both surface treatments was almost identical.