Deep-space robotic patches are black by convention: the field is not a background, it is space. Pioneer 10/11, Galileo, Voyager and New Horizons all sit on a near-black ground while crewed patches go white and red — no surnames, no Earth limb, no crew stars.

The structure is fixed and worth keeping: bullion border, circumferential name band, inner field, and one hairline trajectory arc ticked at each flyby. Set the discs in a grid and the missions read as a lineage. Set the same artwork at 20mm and it becomes a struck nickel badge with enamel wells.