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.
Interlocking star-like forms and elongated lens shapes in turquoise, lime green, crimson, red, violet and bright cyan fill the field, with small diamond accents nested between them. Motifs repeat in a regular grid, with columns of vertical lens shapes alternating with rows of radiating spikes that create a rhythmic, staggered flow.
CC0 — use it for anything, no attribution needed.