I’d like to share with the tool I wrote when stacked with selecting an appropriate color for some border of a new control. I hope it will relieve you when  you be confused choosing a better color for whatever application you do for windows.

Any thoughts or suggestions are welcome!
This is how it looks:

And this is the link to the tool official page: http://netcolorsexplorer.codeplex.com
BTW, you can find the source code of the tool on its web page.