To get rid of the dark circle tragedy use a concealer that is a yellow or orange base which will cancel out the blue/purple  color under the eye.  To finish it off brush a small amount of beige or white eye shadow under the eye to set the concealer.  A really great product is NARS Cosmetics Highlighting Blush in Albatross.

Any questions?  Feel free to contact me, Makeup Artist Caroline Burns anytime!