tty-suppress-bold-inverse-default-colors

tty-suppress-bold-inverse-default-colors is a built-in function in `C source code'.

(tty-suppress-bold-inverse-default-colors SUPPRESS)

Suppress/allow boldness of faces with inverse default colors.
SUPPRESS non-nil means suppress it.
This affects bold faces on TTYs whose foreground is the default background
color of the display and whose background is the default foreground color.
For such faces, the bold face attribute is ignored if this variable
is non-nil.