Schemes is a free and open source GtkSourceView style editor application for Linux. Using Schemes you can edit GtkSourceView style schemes for a platform or an application. It comes with color palette support, mini map, light and dark theme support, set document type, line number, text wrap and set all colors with GUI color picker.
How to Install Schemes on Ubuntu Linux
You can install Schemes via flatpak package from the flathub store. First install flatpak and flathub on your Ubuntu Linux system and restart it after the installation.
Install flatpak and flathub on Ubuntu
After that open the terminal software using the ctrl+alt+t keys and run below Schemes app flatpak install command.
flatpak install flathub me.hergert.Schemes
This will install the latest version of Schemes on your system. You can open Schemes app using below command.
flatpak run me.hergert.Schemes
And uninstall Schemes using this command.
sudo flatpak uninstall me.hergert.Schemes