Red coolant light came on when start the car. Wonder exxon supreme gas issue

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Blue coolant by starting the car..turn off the engine..to stop for errand. Start the car but noticed red coolant came on then disappear. Why is that?. Is that normal? My honda mechanic had to replace spark plug due fuel injector two months ago. Use premium or supreme for gas not cheap gas. First time see red coolant came on then disappear..I know about blue coolant honda fit 2019