I like to use a dark theme for Kile, but the live PDF preview window (which is a great feature) is very bright. Is there any way to make it dark, or set the background black, or invert the colors, or soemthing like that?
I found on my PC that colors can be changed like this
Settings -> Configure kile -> Editor ->Fonts & colors
If you adjust them from that section while you are still using the theme that fits your live PDF needs (the lighter), I suppose you will not have the specific problem (because the theme will remain light but the colors of the real output in the editing window will be adjusted to darker colors).
Possible in the new version there is a menu
Settings -> Configure kile -> PDF Viewer ->Fonts & colors
and in this case may be thinks are even simpler
PS: I used that to have a lighter color between brackets (bracket highlight) than the text area and the line color and it was a nice feature because you can see where your brackets are closing... Do this at least if you don't find my answer useful otherwise (I have no live PDF viewer)
The PDF output can easily be inverted by changing Configure Viewer > Accessibility > Change colours > Colour Mode > Invert colours, However the question says live preview window which is controlled by
Settings > Configure Kile > Tools > Preview > Quick Preview in Bottom Bar Background colour > Basic colors = anything you like
You can also change dpi for larger/smaller and change it for Selection, Environment or Maths
The only setting is background so I don't think you could invert unless you set the text to white, which could cause issues with down stream PDF generation, so I would suggest a grey tone whilst previewing. there was a similar request discussed here
On further testing Quick preview can call up Okular which also has Accessibility > Change colours > colour Mode > Invert colours so I guess its down to which window your using to preview.