support dim

### Describe the feature request

ansi dim allows for darker colors.

### Why do you personally want this feature to be implemented?

i like dark colors

### How long have you been using this project?

idk a few days I think?

### Additional information

https://gist.github.com/ConnerWill/d4b6c776b509add763e17f9f113fd25b#colors--graphics-mode