To an observer, a white iceberg often appears greenish-blue just below the surface. Of course it is the very same white iceberg below as above, it’s just that the big blue ocean makes it look that way. Observe an iceberg long enough and you’ll see one turn over or flip on its side, revealing that its belly was white all along.
Today I saw a bergy bit grounded near the beach at Stiles Cove, and because this morning’s rainstorm made the waterfalls pour dirt-filled freshwater into the sea, the entire cove was filled with brackish brown water, giving the iceberg a brand new look:
This is the usual colour around icebergs when they’re in ocean water: