with colordef("black") and colordef("none"), title & axes labels are invisible (black/black)
Reported by Samuel GOUGEON (@sgougeon)
BUG DESCRIPTION:
----------------
Both color L&F "black" and "none" use an axes background dark or really dark.
Then titles & axes labels that are also black are invisible or almost invisible.
These L&F should set a while .font_foreground for labels.
ERROR LOG:
----------
HOW TO REPRODUCE THE BUG:
-------------------------
See the left image on https://help.scilab.org/docs/6.0.1/en_US/colordef.html
The title is almost invisible.
For the "none" L&F, the background is really black, and the title really invisible.