mottled (adj.)

• blotched
• blotchy
• brindled
• calico
• clouded
• dappled
• flecked
• freckled
• marbled
• motley
• multicolored
• patchy
• piebald
• pied
• spattered
• speckled
• splashed
• spotted
• spotty
• stippled
• streaked
• streaky
• variegated