Beauty Tip: Finding the right undereye concealer shade

When I first started out with makeup a few years ago, I thought the colour that you wanted under your eyes to conceal dark circles, veining etc was yellow, recently I learned it should actually be peach or salmon tones. However, many drugstore brands still make under-eye concealers in just flesh tones,. And MAC makes them in the standard NC and NW shades. It makes it difficult to decipher what shade is right for you. Also, you can conceal under the eyes with something over than a liquid concealer, such as a cream, but for the purpose of this post, I will focus only on liquid concealers.

My understanding is that under-eye concealers should be a shade lighter than you foundation this is because you want to brighten that away and take away any darkness that may be there. However, I see this all over the internet where girls have the reverse raccoon eyes going on, their concealer is almost white and it does not look pretty in my opinion. It seems to me that your undereye concealer should be close to your skintone, that way it doesn't appear white underneath and it covers, which is the point after all. Okay, this is something that I have been struggling with, so maybe you girls can help me out. I will go through all of the under-eye liquid concealers that I have here. I know that using eye creams can also help with the under-eye darkness or baggage that many of us have, however I have yet to find anything that does much.

All pictures can be enlarged!

swatches of all my undereye concealers, click to enlarge
Colours range from orange (MAC) to beige to peachy to yellow - which one works best?? 


*Concealer swatches below on eye are not blended in perfectly, in order to show the varying states.

Bare eye, notice the purple-ish in corner and hallow under my eye. I usually wear eyeshadow so pay no attention to the dicolouration on the lid.

MAC Moisturecover NW20, looks crazy dark and orange in the swatch, but on the eye, it kinda blends in almost with my skin, and I always wear foundation over it so. I don't think it's too stark. Give me your inputs please. It does cover the purple pretty well. I am debating on return this and getting the NW15 instead,

Revlon Blemish concealer, too light in my opinion, I only really use this on my chin (for blemishes).

Maybelline Mineral Power, I think this is okay, but it doesn't cover as well as the MAC.

Maybelline Superstay looks very similar to the Mineral Power except it dries matte very quickly. 

Maybelline Age Rewind concealer, this probably applies the nicest of all, and the best colour.

ELF's Undereye concealer is probably the worst out of all of these, now that I see the pictures, it's the sheerest and runniest, does not conceal very well at all.

Revlon Age Defying Spa, this one is a liquid, but applies more like a cream which I like, more thick, and has that yellow tint that I like.

I know my pictures are pretty sh!t, but hopefully you can give me some suggestions, I think some of my concealers are too light and do not cover as well as they could if they were darker. I know my undereye darkness is not terrible, but I do want to find something that works. What colour do you think works best for me. I need your advice!!!!!!!!!!!!!!!!!!!!!!!!! :)