Simple green glass has a distinct green hue, which alters the light effect and is also noticeable as a clear discoloration in the glass surface. The brighter, whiter, and clearer the interior design, the more disturbing this discoloration is. Even against a plain white wall, the difference is clearly visible. White glass doors from WUNDERWERK est. 1964, on the other hand, remain color-neutral and allow more light to pass through.