[2015r1] Inverted Colors (El Capitan)

I need to change the colors I use for a ListBox (LB) alternate back colors depending on the display view (Inverted Colors for disabled people or standard colors).

I checked Windows.BackColor in standard mode and in inverted colors: same values (while in screen, it is white or black depending on the Inverted colors status).

Is there’s a Declare to get the actual colors (and so change or not my LB background colors) ?

The idea is to keep cmy to 10% in both modes the LB backdrop colors will be the same instead of violent Red and violent Blue…