A background should sit behind the text, not in place of it. This paragraph lies on the tile at its true scale — if it reads without effort, the tile can go under content.
Bright spring-green starbursts radiate from dark teal and forest-green diamond cells set against black ground, with small octagonal rosettes at the grid crossings. The motif repeats in a regular offset rhythm, so rows of stars and diamonds alternate across the page in a steady lattice.
CC0 — use it for anything, no attribution needed.