Hi,
Tools > Effects and Filters > (Tab) Video Effects > (Tab) Essential
Clicking Image ajust
The sliders for Contrast, Saturation & Gamma don't work properly.
Tried both VLC 3.0 32-bit and 64-bit with same result
Uninstalled 3.0 and installed 2.2.8 and Contrast, Saturation & Gamma works as it should