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.
Muted slate-blue ground carries rounded, bean-like lobes and clusters of small dots outlined in darker blue-grey, forming lace-like medallions. Rosette clusters sit in a grid, with interlocking arcs of circles linking them, repeating in a regular diagonal rhythm across the surface.
CC0 — use it for anything, no attribution needed.