In KF5, KTextEditor gained lots of new default styles, see here: http://kate-editor.org/2014/03/07/kate-part-kf5-new-default-styles-for-better-color-schemes/ Although our highlighting xml files do not yet use these default styles at all as of now, the predefined color schemas are still incomplete. For instance, the default styles "Constants" in the "Vim (dark)" scheme is not yet fixed, leading to unreadable code. The default styles are stored in src/data/katesyntaxhighlightingrc. Typically, fixing a Scheme involves to 1. fix it in Kate (in the GUI) 2. and then copy the relevant INI like config section from your local katesyntaxhighlightingrc file into the global one. All predefined color schemes need to be adapted.
I just checked again, and it seems some color schemas already contain the new default styles. So this bug is about checking this again to verify the schemas are really complete.
Looks good to me, so safe to close.