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.
Vivid lime green, orange and magenta fields carry a dense interlaced motif of blue-violet diamond stars and small square medallions, with flame-like swirls filling the spaces between. The motif repeats in a regular diagonal lattice, so stars and medallions alternate across rows and columns in a steady, rhythmic grid.
CC0 — use it for anything, no attribution needed.