copy all dcol files into ~/.config/hyde/wallbash/always
copy steam.sh into ~/.config/hyde/wallbash/scripts
run chmod +x ~/.config/hyde/wallbash/scripts/steam.sh
run ~/.config/hyde/wallbash/scripts/steam.sh
Open steam, enter big picture mode, press control and 2 to open the panel. Navigate to the plugin store, and install CSS Loader. Then in the new CSS Loader menu, click refresh, and enable the two themes. You can now exit big picture mode by pressing mod + Q.