Tea-related hindsight

[mtbc]

I made myself a little bag of assorted teabags for drinking at work. When I pour the water from the kettle, I discover which kind of teabag I have as the various kinds promptly color the water differently. However, for example, my wont is to pour boiling water onto black tea but to use water just shy of boiling for green tea. I thus find that I need to know which kind of tea it is in order to perform the operation that tells me.