What happens next in this paragraph?

How to tell the difference between subtle, subtly and subtlety
Use subtle as an adjective.
The word " subtle " describes a noun that is difficult to notice or understand. Here are a few example sentences :
The dresses are all wonderful, but their colours have subtle differences between them.
My mother's warning glance was a subtle hint that i should change the topic. The painting looks drab at first, but there is a subtle beauty in the pattern of brushstrokes.