modern abstract blue background for wallpaper. premium background with geometric dark s.

line text font brand blue diagram circle screenshot presentation azure design document purple logo aqua pattern advertising number abstract background art backdrop banner color cool cover dark shadow darkness digital elegant foamboard future geometric shapes glow gradient graphic indigo invitation card luxurious luxury modern monochrome patterns premium quality rich sci-fi shopping simple stylish technology texture vector vip club visual wallpaper web website business banners formal invitations vouchers prestigious gift certificates wallpaper shapes