It looks like you're searching for free wallpapers from (also known as Oliur Rahman/ULTRALINX), who is a well-known creator of premium design resources, including wallpapers.

(e.g., "Ultralinx Wallpapers," "Abstract Packs," "Gradient Packs") on Gumroad and other marketplaces. He rarely offers his full premium packs for free.

Don't let a boring screen ruin your setup. Download the free pack today and see the difference a good background makes.

If you meant to ask something else — like how to find free wallpapers similar to Oliur's style (minimal, gradient, abstract, pastel) — let me know and I can help further.

If you use a blue gradient wallpaper, set your system accent colors (on macOS or Windows) to match.