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.
Rounded triangular outlines in pale khaki and olive bands frame deep near-black centers, linked by star-like junctions at the corners where neighboring shapes meet. The interlocking loops repeat in staggered rows, so the eye reads a steady diagonal rhythm across the field.
CC0 — use it for anything, no attribution needed.