Karasa Jaga icon theme is a modern freedesktop icon theme that aims to keep up the distinguishability of iconography. Most of icons are based on (now-retired) Oxygen icon theme, some of them from Crystal icon project and the rest is mix-and-match.
Use the script to install the latest version directly from this repo (independently on your distro):
curl -s https://raw.githubusercontent.com/rizmut/karasa-jaga-icon-theme/master/install-karasa-jaga.sh | sh
For GNOME based desktop, run following command to activate the icon theme
gsettings set org.gnome.desktop.interface icon-theme 'Karasa-Jaga'
For any other desktop environment, use respective tools/software based on desktop environment type
curl -s https://raw.githubusercontent.com/rizmut/karasa-jaga-icon-theme/master/remove-karasa-jaga.sh | sh