@fribbledom I added an alias to enable colors in xterm:
alias duf='TERM=xterm-color duf -theme light'
BTW: When 'duf-utility' is installed via 'snap' in Ubuntu it shows some local mounts as "squashfs", assuming since it's running within a sandbox (snap), also got this error:
"ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded (failed to map segment from shared object): ignored.".
After installing from source 'duf' works fine.