background blind blinds courtain cover light lines parallel shade shades texture vertical wallpaper window windows above angles appearance arched architectural architecture awning coloring colors colouring colours construction curve curved curves elements exterior external fixed height high painted pane protection protective shape shaped shapes shelter style surface surfaces textures views wall walls window-frame window-frames window-pane window-panes window-protectors window-shade window-shelters curtain horizontal pattern tile art azure decorative window electric blue Material property orange rectangle symmetry Tints and shades