Another image added to the free Gallery: Common Conductor Color Coding

The only mandated colors per NEC are white or grey for neutral and green, green yellow or bare for grounds regardless of voltage.

Your chart does not follow the typical convention of brown orange yellow for 277/480.

A 120240 delta should have a candy striped red white for the B phase

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The image has been updated in the OP! Thank you.

Sorry, looks the same to me.

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