Honey in my herbal tea

Why does my herbal tea change color when I put honey in it ?

Honey contains, in more or less quantity, microscopic particles of humus torn off by the wind and deposited in the nectar of flowers.

These particles provoke a more or less strong coloring reaction when in contact with the tannins of the plants constituting some herbal teas. This reaction does not present any danger for health, it is completely natural.