Fedora 23 Workstation is a great desktop but let me tell you the icon theme is awful (sorry to say that :)). If you agree with me, you may change your icon theme to something else. There are many beautiful icons and theme available for Fedora 23. I just found Numix Icon Theme Technic which is just awesome. Technic is short for Technicolor which means we can change the icon color easily.
Here are some screenshots of my Fedora 23 Workstation with Numix Icon Theme Technic
B. Extract the master.zip to your directory
C. Move the extracted folder to /usr/share/icons
If you having difficulties, please follow the step by step guide below (via Terminal)
Download via Terminal:
cd ~/Downloads wget https://github.com/tech4david/numix-icon-theme-technic/archive/master.zip
Extract the zip file
Move numix-icon-theme-technic-master folder to /usr/share/icons
sudo mv numix-icon-theme-technic-master /usr/share/icons
Done. Now use Gnome Tweak Tool to change the icon theme. You may want to install Gnome Tweak Tool as well.
sudo dnf install gnome-tweak-toll
cd /usr/share/icons/numix-icon-theme-technic-master sudo ./colour.sh
Type green, yellow or other colour. You can endit the colour.sh file if you understand the hex colour symbol.