List of KDE themes with GTK ports

    From KDE UserBase Wiki
    Name Qt Aurorae* GTK 2 GTK 3
    Breeze / Breeze-Dark Yes Yes
    Oxygen Yes Yes No
    Arc / Arc-Darker / Arc-Dark Yes Yes
    Adapta / Adapta-Nokto Yes Yes
    Materia / Materia-light / Materia-dark Yes Yes
    Numix Yes No Yes
    Nomad Yes Yes
    Adwaita Yes No Yes
    Pop Yes No Yes

    * For themes which do not provide Aurorae window decorations, a consistent look can be achieved by using gtk3-nocsd to disable GTK 3's client-side decorations.