mainstage text and background colors

Hi,
trying to solve this:

EDIT mode

Patch inspector:
3 sub pages: Patch Library - Attributes - Tuning

No problem for Attributes and Tuning

Patch Library:

the background Color is very dark, and the texts are black.
I can barely read the texts, and I would like to have these texts in white, on the background Color not so dark.

Can I change this ?

What I've tried:

1/ In "Assignments and Mapping" I didn't find any way to access to these Color parameters

2/ I deleted the Maintage Preferences file in Library/ (com.apple.mainstage3/plist) and restarted

Thank you so much for any help
R