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.
Interlaced blue and pale aqua lattice weaves around rounded medallions of deep indigo squares, with diamond-shaped clusters of white and light cyan sitting between them in a staggered grid. Medallions and diamonds alternate in offset rows, so the eye reads a rhythm of dark rings and bright lozenges that repeats across the field.
CC0 — use it for anything, no attribution needed.