jetbrains-settings/laf.xml

<application>
  <component name="LafManager" autodetect="false">
    <laf class-name="com.intellij.ide.ui.laf.darcula.DarculaLaf" themeId="CUSTOM" />
    <lafs-to-previous-schemes>
      <laf-to-scheme laf="Custom Theme (Material)" scheme="TheoryOfNekomata" />
      <laf-to-scheme laf="Dark" scheme="TheoryOfNekomata" />
    </lafs-to-previous-schemes>
  </component>
</application>