Yes that is a coolant hose. I wouldn't expect any issue with a splash of it getting in the area, but you'd be wise to clean everything up as best you can at this point while you have access. Plus, you'll want to observe to be sure the leak is fixed.
If you still have access, you might consider replacing the rubber o-ring that seals that coolant hose. If not, you're probably fine but it's just something to be aware of.
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