A secret between us: I am a scam. 
I’m not an artist or some expert. I’m an engineer who plays with numbers.
About inkscape I know how to install/uninstall it, open and close a file, nothing else.
One biiiig day I will study @dirn 's topic, but I am lazy too. 
So my “perfect” Kvantum theme, with the “matching colors” is the purpurday kvantum edited in a …text editor.
svg is scam too, it’s text 
Left: the edit, right up: the result, right down: the original:
