Using your own themes
You can create custom themes as .conf files and place them in the themes sub-directory of the kitty
config directory, typically ~/.config/kitty/themes.
The kitten will automatically include them in the list of themes.
To modify the built-in themes, name the .conf file Some theme name.conf
to override the built-in theme of that name. Here, Some theme name is the actual built-in theme name, not its file name.
Note that after making changes, you need to run the kitten and select that theme once for your modifications to take effect.