In case of doubt, I would prefer the roof to be in a darker tone than the windows - but if the difference is only "behind the comma," I wouldn't mind. So, for example, if the difference is only between "7016" of the windows and "similar to 7016" of the roof covering, i.e., basically only in the production tolerance of the tile color. Besides, the roof undersides are in between. Therefore, one can hardly distinguish "same" and "almost same" as "disturbing." Hence, I would refrain from "definitely significantly darker" just to be safe. But I would not accept "lighter" (than the windows).