Create one standalone premium abstract textured background image for web design. No text, no letters, no interface, no logos, no watermark, no border, no collage. Full bleed. Tactile irregular stochastic grain integrated into the colors, not a visible repeating pattern. Keep useful quiet negative space for website copy. Square 1:1. A single enormous off-center cobalt blue luminous ring, cropped at the upper right and lower edges of a black canvas, with a subtly icy inner rim. The light dissolves through rich medium-grain airbrush stipple into deep black. The central left area is calm and nearly black for copy. No cosmic stars, no purple. Graphic geometric annulus, not a planet or physical object.