It can, but it is a deliberate warm-cool contrast at the window. Gray walls with Biscoff curtains read as a confident designed combination if the room has other warm elements (warm wood, brass, leather, terracotta) to support the warm note. In a strictly cool gray-and-white interior with no other warm elements, Biscoff would read as out of place. For warm-leaning interiors, Biscoff works beautifully against any wall color from cool gray to warm cream.