Choosing colortheme other than breeze is not saved. Reproducible: Always
here it works, but only for applications started after the colors have been applied (it doesn't change on the fly colors of running applications)
it also probably means that the kcm side is fine, and the bug is in the frameworks side? maybe in kconfigwidgets where kcolorscheme resides?
Bug was in the KCM: b76b63136114838d3f16cea9c666f725615a92ff and slightly related 60daaff19238b8d64200a62a235e2a1dbc5139a7