KDE font config from https://forum.kde.org/viewtopic.php?f=66&t=162976#

.fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
 <dir>~/.fonts</dir>
 
  <match target="font">
  <edit mode="assign" name="rgba">
   <const>rgb</const>
  </edit>
 </match>
 
  <match target="font">
  <edit mode="assign" name="hinting">
   <bool>true</bool>
  </edit>
 </match>
 
 <match target="font">
  <edit mode="assign" name="autohint">
   <bool>true</bool>
  </edit>
 </match>
 
 <match target="font">
  <edit mode="assign" name="hintstyle">
   <const>hintslight</const>
  </edit> 
 </match>

  <match target="font">
  <edit mode="assign" name="lcdfilter">
   <int>2</int>
  </edit> 
 </match>
 
</fontconfig>