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.
Vivid violet ground carries interlaced diagonal bands edged in teal, blue and olive, forming star-like rosettes inside nested triangular frames. Rosettes repeat in staggered rows across the grid, with horizontal bands crossing between them to create a steady, rhythmic lattice.
CC0 — use it for anything, no attribution needed.