I think it would look fine, but better if the tights and sling backs are the same or similar colors. I wouldn't, for example, wear black tights with beige sling backs.
Originally Posted by curlypearl

True. Color matters. I never like light shoes with dark tights, but dark shoes with light tights is OK. I only wear black/navy/dark-brown tights, and I match them to my shoes/skirt.