1987 Honda CRX Coolant

I have a 1987 Honda CRX DX with the original D15A1 engine (1.5L carburated single cam 12 Valve). I live in Canada and this is the Canadian version of this car.

What is the CORRECT coolant to use in this engine? I think 1987 predates the Honda Blue coolant standard, but can’t find any good information that isn’t a coolant manufacturer’s recommendation. Any insight would be appreciated