ProtonPass by Arkamas

This theme uses color coding from Proton Pass to closely match for Firefox/Librewolf.
Custom home URL for DuckDuckGo theme:
https://duckduckgo.com/?kae=d&kx=beb8d8&kao=-1&km=l&kak=-1&ko=d&k7=181825&k1=-1&kav=1&kap=-1&kaq=-1&kax=-1&kw=w&k9=A4B5FF&kj=1E1E31&k8=beb8d8&k21=1e1e31&kau=-1&k18=1&kv=1&kdcm=3&kdcs=1&kbi=1&ksn=5