Is guacamole ok to eat if it gets discolored while in a covered refrigerated dish?

Yes, guacamole can still be safe to eat if it gets discolored while in a covered refrigerated dish. The browning occurs due to oxidation and is typically just a change in appearance, not necessarily a sign of spoilage. However, if there are any off smells or signs of mold, it's best to discard it. To minimize browning, you can add lime juice or store it with plastic wrap pressed directly onto the surface.