To change the colors of the default theme you need to add a `theme.ron` file that contains the colors you want to override. Note that you don’t have to specify the full theme anymore (as of 0.23). Instead, it is sufficient to override just the values that you want to differ from their default values.
The file uses the [Ron format](https://github.com/ron-rs/ron) and is located at one of the following paths, depending on your operating system:
Alternatively, you can create a theme in the same directory mentioned above and use it with the `-t` flag followed by the name of the file in the directory. E.g. If you are on linux calling `gitui -t arc.ron`, this will load the theme in `$XDG_CONFIG_HOME/gitui/arc.ron` or `$HOME/.config/gitui/arc.ron`.
Example theme override:
```
(
selection_bg: Some(Blue),
selection_fg: Some(White),
)
```
Note that you need to wrap values in `Some` due to the way the overrides work (as of 0.23).
* all customizable theme elements can be found in [`style.rs` in the `impl Default for Theme` block](https://github.com/extrawurst/gitui/blob/master/src/ui/style.rs#L305)
