I found the red numerical values in the tooltips a bit hard to read, so I adjusted the RGB values to a lighter, paler red, which for me, seems easier to read alongside the white text in the tooltips.
The file to edit is \Espana 1936\SCW\Settings\UserInterface.opt
In the Colors section of the file I adjusted the following line:
colToolTipNb = 255|128|128|255
(It was originally = 255|0|0|255)