Theme "Fusion dark" and close tab

[mustbeit]

I like the Fusion dark theme, however, the "close tab" cross, aka X is dark under a dark background
=> barely you can see it, so it would be nice to change the cross X colour to for instance red.

Possible?

[xnview]

Thanks to your detailed description I can reproduce

[xnview]

See issue for current status and some details.