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 cyan, blue, yellow and dark red shapes form a grid of glowing yellow rounds ringed in purple, alternating with four-petaled yellow flowers and small red leaf forms set in cyan fields. The motifs repeat in a regular offset rhythm across the sheet, with the flowers spaced at intervals that create diagonal bands of color.
CC0 — use it for anything, no attribution needed.