vibrant green octagon on white background - flat

green octagon white background vibrant color gradients flattened perspective flat design basic shape isolated geometric simple modern minimalist graphic vector abstract contemporary stylish clean sharp edges polygon minimal fresh crisp bold eyecatching artistic visual digital web logo branding octagon-shaped odometer showcasing panel composition mastery artwork features non-representational shapes simplistic cartoon style illusory gradient adds depth piece use paper creates smooth shiny effect sleek visually captivating generated