They might help.
There are three dead links at the bottom of this email
which might live elsewhere in case that helps.
I am on a similar search as you for LaTeX in kile, in my case, and will share my results here. There appear to be two aspects for kate/kile
Schema which is independent of the file being edited; and
Syntax highlighting which is file and language dependent.
One needs both. The syntax highlighting might need tweaking depending on language and keywords used. Indeed it might not exist for some languages.
Over and above this, there is the general KDE theme which includes colour schemes and styles. These are applicable to all application windows. So, there appear to be five components in all:
(b) Colour Scheme
(d) Kate or Kile schema
(e) Kate or Kile syntax highlighting