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.
Green and violet faceted medallions sit on a slate-blue ground, with rounded diamond-shaped voids outlined in magenta scalloped bands. Interlocking arcs link the medallions into a grid, and the repeat falls in regular rows and columns, with the diamond voids and star-like rosettes alternating across each row.
CC0 — use it for anything, no attribution needed.