I-beam pointer background color inversion The background color of the I-beam cursor inverted as follows (only in Blender):

Seems that something got toggled…

N.B. Loading the factory settings couldn't solve the problem.

Specs: blender 2.79b - f4dc9f9 // MacOS 10.13.6

Thanks in advance for your suggestions!  

Following: User Preferences > Themes






Extra:
It should be this setting, in the "user interface" section: