Stroke selection outline color doesn't match the color selected

[marigolden]

I'm trying to make an outline around a selection but the outline color isn't turning out right. It's a white dot that I want a blue outline around. I have it selected then go to edit>stroke selection yet the outline color turns into a cross between white and the blue color I want. How do I get the outline to show up as the blue I chose? 

Also, not necessary but would be convenient, is there any way to get the outline to come up beyond the selection, basically making it bigger, instead of stroking it within it?