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.
Concentric diamond and star motifs built from nested bands of red, green, and blue on a dark navy ground, with the bands tightening toward each center. Diamond clusters repeat in a regular grid, with a small four-pointed star at each node and lighter crossing points where the rows meet, producing a steady, rhythmic lattice.
CC0 — use it for anything, no attribution needed.