Well then. Apparently Twenty Fifteen was too good, or at least it was without notice given reduced functionality in that the white background was removed and some ugly color schemes were enforced.
So I quickly had to change theme to something else to spare my eyes from the coloristic horror. A pity since the design was otherwise really great, but for now I’ll go with Penscratch until I find something better even though Penscratch does not seem to scale properly on SmartPhones, but the number of times I use that is so few in comparison with larger screens that it’ll have to do. I’ll miss Twenty Fifteen though.