If you ever wondered, how do I see changes on my themes as I design them? Well, in order to see the changes in realtime, there are a few things I need to do. Plasma keeps two cache files for the Plasma theme in ~/.cache, they are named accordingly. Every time I make a change in Inkscape, I save it out to the theme folder and then delete the two .cache files, then reapply the theme and this will show the new changes. This allows me to make the themes faster since I can see the changes as I do them. So, the System Settings>Workspace theme>Desktop Theme is always open and a Dolphin window at ~/.cache. I usually have KColourChooser open as well so I can sample colours from themes I do, like from the Windows theme screenshots.