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 ground is interrupted by interlocking blue and red outlined forms: rounded square frames with inner squares, and diamond-like lobes that meet at blue crossing lines. The motif repeats in a regular grid, with square frames alternating with diamond clusters in offset rows, creating a steady, lattice-like rhythm across the page.
CC0 — use it for anything, no attribution needed.