What does FocusRect color do?

[Krekkie]

Been using Multi Commander for a few days. Trying to determine if it can replace my previous file manager(s).

In Configuration - Explorer Panel settings - Colors - File and Folder state colors, what is the purpose of FocusRect color?
I think this is the rectangle color around the folder or file in focus but changing this color doesn't behave as expected. Am I right about this setting? If so, I will explain the strange behavior. If not, please enlighten me.

Using version 2.7.2 (build 1200) 64 bit Edition on Windows 7 Professional SP1 x64.

[Mathias (Author)]

It is the color of the focus frame. But since the frame is drawn in a xor like way. the color is kind of blended with the color of the background. so it will never match exactly

[Krekkie]

So when using a black background the colors do match exactly but with a white or light yellow background I get these results:

color setting --> color and style of the rectangle on screen
black --> black dotted
red --> teal dotted
green --> violet dotted
yellow --> blue (not dotted)
violet --> green dotted
pink --> black (not dotted)
and so on...

So how can you get the color that you want when using a light background?