T12567: Reduce code/effort duplication around color scheme support

[Noah Davis]

ndavis updated the task description.

TASK DETAIL
  https://phabricator.kde.org/T12567

To: ndavis
Cc: plasma-devel, kde-frameworks-devel, ndavis, Orage, LeGast00n, The-Feren-OS-Dev, jraleigh, zachus, davidre, fbampaloukas, GB_2, ekasprzak, ragreen, domson, michaelh, ahmadsamir, dkardarakos, ZrenBot, ngraham, bruns, alexeymin, kpiwowarski, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, asturmlechner, jucato, cfeck, abetts, cgiboudeaux, cullmann, vkrause, sebas, cordlandwehr, apol, ahiemstra, davidedmundson, mart, hein, knauss, dfaure
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