Explorer uses colour to mark what kind of thing a value is — name, wallet, contract, transaction, or link — so you can tell them apart at a glance. Here's the legend.

A readable name like yourname.eth. The chip shows the name, an avatar, an Owner tag, and a copy button. Blue means you're looking at the name, not the address behind it.

A 0x… address belonging to someone's wallet, not a contract. The chip shows a shortened address, a copy button, and an arrow to the address page.

Code on-chain rather than a wallet. The chip shows the contract name where we know it, a copy button, and an arrow to the contract page. Wallet and contract addresses look identical — both are 0x… — so colour is the fastest way to tell them apart.

The 0x… hash for a single on-chain action: a transfer, a registration, a record change. The chip has a copy button and an arrow to the transaction on Etherscan.

Pointers to somewhere else, usually Docs or Source. Grey isn't on-chain data.

Explorer has a light theme and a dark theme. These colours mean the same thing in both.

The theme control lives in the wallet menu, so you need to be connected to reach it. Connect your wallet, click your address pill in the header, and hover Theme. You get Light, Dark, and System — System follows your operating system.