What does "subtle" mean?

Native speaker’s answer
Rebecca
"Subtle" is an adjective that means not loud, obvious, or noticeable in any way. It can also mean a small but important difference or that something is done in a way that does not attract attention. Ex: There is a subtle difference between the two paint colors. Ex: You need to be subtle when trying to get the teacher's attention. Ex: The tone of anger in his voice was subtle but present.