Spark plug readers!

Guys! My plug look like this, I know this isn't right should be tan, is this too much timing? I have a 318 mild cam 260/264 duration edelbrock 600 cfm .89 jets up front .98 in the rear. Motor does not ping timing I bought a timing tab waiting on it she's pulling 16 vac at idle 150psi each cylinder cold test auto lite 65s my guess are timing too advanced or plugs too hot

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