Stroke selection outline color doesn't match the color selected

[Blighty]

In the Stroke Selection dialogue, are you using "Stroke Line" or "Stroke with a paint tool"? If you are using "Stroke with a paint tool" and have a soft brush selected you will get the effect you are describing.

You can also uncheck "Antialiasing". This will give a hard edge, but introduces jaggies.

Note the 3 layers that I used. Make editing easier.