Color definition not saved

[dx05]

Wenn I restart Visual Studio 2026, the guidline color is back to default. I'd like to keep my favourite color.

[chemodax]

I cannot reproduce it with Visual Studio 2026 (18.6.0):

[dx05]

I use Parallels VM with VS 2026 18.6 Community Edition. I just retested it. My Setup is for Dark Mode. I once again startet VS 2026 (grey dashed guidelines), changed the color in the IDE to red. Everything fine unto this point - beautiful red dashed guideline. Then closed VS and restarted. Grey dashed line again. :-( If there is any idea what could cause it, I'd be thankful.