Which coolant .... a really green question.

My coolant ( antifreeze ) looks a little low and I decided to top it up. It was after 7pm so I nipped to the Shell garage near me as I know they stock oils, etc.

Bought the coolant and the distilled water £8 later. When I mixed it I noticed it was blue in colour but the coolant in my reservoir is a pale yellow colour.
It says on the bottle not to mix coolants of two different colours … internet search says they can react causing them not to work properly. Also discovered that motorcar coolant can eat away at the seals on the motorbikes because it’s silicone based coolant

I’ve got a Honda Hornet 2008 model. What’s their recommended coolant?