Spain retains sovereignty over three territories often classified as autonomous communities/cities rather than colonies:
Archipelago off NW Africa (100 km west of Morocco). Seven main islands. Autonomous community since 1982. EU outermost region. Population ~2.2M. Economy: tourism, agriculture, services.
City on North African coast, bordering Morocco. 18.5 km². Autonomous city since 1995. Population ~85K. Strategic port, free trade zone. Border fence with Morocco.
Similar to Ceuta: North African coastal city, 12.3 km², autonomous since 1995. Population ~86K. Commercial hub, fortified border.
All three are integral parts of Spain (not colonies), send representatives to Spanish Parliament, and use the euro. Morocco claims Ceuta and Melilla; Spain asserts historical sovereignty.