latar belakang biru abstrak gelap pola garis geometris abstract technology background, dark blue color. hi-tech or digital future

backdrop blue abstract dark pattern lines geometric cover gradient vector angle white modern concept elegant graphic layout light design space texture blur card paper technology banner business color element web brochure digital futuristic overlapping shape website bright creative layer shadow template background latar belakang biru abstrak gelap pola garis geometris hi-tech future color concept