Control flow keywords are highlighted differently

[Araq]

if, case and the like have a different color than e.g. proc. This makes little sense in Nim where templates can provide new control flow structures. There should not be a distinction between "keyword related to control flow" and other keywords. (Besides, I'm not aware of any usability study that shows benefits for having all these different kinds of keyword sets.)

[Yardanico]

This is more of a bug with the theme than with the plugin - vscode-nim doesn't define any colors but it does differentiate control keywords from normal onas.

This is how it's done in a lot of other languages too, see the TextMate example grammar - https://macromates.com/manual/en/language_grammars - "For example the first rule above assigns the name keyword.control.untitled to the following keywords: if, while, for and return"

[Yardanico]

With monokai vibrant (or even VSCode dark) it's all the same colour:

So if you don't want custom themes my suggestion would be to use VSCode Dark. Preferences icon in the bottom right - Color Theme - "Dark (Visual Studio)" (the default one is "Dark+")

[saem]

The definition in the extension does not set the colour, that is correct.

The syntax highlighting definition does classify various syntax using a dot separated string with some conventions.

Those conventions are then used by the theming to colour the various items. It's this classification that needs fixing.