One color is surrounded by an edging of another.

A daylily blossom with a distinctly different color along the edges of the blossom segments. The edge color may appear on the petals, sepals, or both. Recent hybrids with distinctly colored blossom edges are often referred to as having picotee edges.

having a border especially of a specified kind; sometimes used as a combining term; as, black-bordered handkerchief. Antonym of unbordered.