Colored Tights: A Mini-Lesson.

See, this is how you do colored tights. Keep everything up top neutral...and voila - a burst of color that looks playful, not costume-y!
From Y-3.
Also, I love how Kylie Minogue worked this look, out and about in London the other day. So elegant!

It works beautifully because the rest of her outfit is completely understated.
Photo credits Style.com and Splash News