If app icons are white on black background should they be inverted in help documentation?

Stoper

Hi,

The app has a black toolbar with white icons on it. When writing the
procedure I include the icon to the step, for example, "Tap Add [+]". The
white plus icon on black background looks strange, but that is how it looks
like in the interface. The black icon on the white/grey background looks
better, but it can confuse users. See attached. Should I leave it as is or
invert the icon? Is there any policy or best practice for this?

Regards,
Serhii

smajors

Hi. Sorry, I'm not seeing an image with your post. It would help to see a visual.