Dark mode for Internal Viewer

Hi there, 

The dark Dracule theme is great, but it seems it doesn't handle **Internal Viewer**
I'm using Solarized Dark, which also include this section:
```
[Lister]
FgColor=9868419
BgColor=3549952
FgSelColor=4339200
BgSelColor=8616805
LinkColor=13798182
```
Check this:
https://gist.github.com/delphym/e602a8616e48eda6fb15c1c7087886bf?permalink_comment_id=4408971#gistcomment-4408971
