What pro longwear concealer would work best for someone with C2 foundation?

Hi all, first time poster here, hoping someone can help a girl out! I purchased face and body foundation in C2 over a year ago, and I love it. I'm now looking to purchase pro longwear concealer for my under eyes. I don't have bad under eyes, but they are a little greenish/blueish and I'd like to BRIGHTEN them up. So I'd like a concealer that's maybe a shade or two lighter, but I'm not sure which one would work best for someone that uses C2 foundation. I'm currently living in a third world country, and there aren't any MAC stores, so I'll have to purchase online without trying it out. Thanks in advance /emoticons/[email protected] 2x" width="20" height="20" />