No that is just for the actual marquee and selection dots.
I can't say I have noticed a problem with the selection marquee but I have only just started using 20 - mine is a light grey fill.
I will keep an eye on it.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11