Hello,
to be easier on the eyes, I've created a flat dark and light theme, and thought I'd share it...
Definitely still work in progress, I've also put it on Github here: https://github.com/mruegenberg/HoudiniFlatThemes
To install, just copy the files to `houdiniX.Y/config` folder (create the config one if it doesn't exist), usually located in your home directory.
Partially based on some other themes floating around the web (e.g
UIDarkFlat.hcs
UIDarkFlat_NodeGraph.inc
UIDarkFlat_NodeGraphCommon.inc
UIFlat_basic_colors.inc
UILightFlat.hcs
UILightFlat_NodeGraph.inc
UILightFlat_NodeGraphCommon.inc