Change Theme - quinton-ashley/nostlan GitHub Wiki
Nostlan has different themes for every system it supports. If you become a Patreon supporter you can unlock additional themes I've made and even make your own custom themes.
gba: purple (default), blue SP, light blue SP, red SP, silver SP
gcn: purple (default), orange, silver, panasonic Q, black
snes: Super Nintendo (USA) controller (default), Super Famicom / PAL controller, Super Nintendo (USA) console, snes game box
switch: red and blue (default), splatoon 2, animal crossing
How to Change a System's Theme
1. Open the Main Menu by pressing the Nostlan button.
2. Select "Settings Menu", then "Change Appearance", then "Change Theme"
3. Select the theme you want. Nostlan will save your changes when you quit the app.