Hi, I've been lurking on here and throughout the main site for months,waiting until I run out of my foundation so I can order!
I think I have primarily yellow undertones, with little to no pink, but I wanted to get a second opinion. I don't have any photos of me without makeup unfortunately, and I've never really been able to find my perfect match. I'd like to match my neck... in a lot of photos my face appears lighter, but it may be because my foundation is too light... But does somewhat appear that way in real life as well, without makeup. I was somewhat close with EDM's Golden Winged Butter, but I found it to be just a bit too yellow. I also tried Meow's Korat #2, but it was too light and grey, not enough yellow. I've also tried BE in Light and Fairly Light, but both turned bright orange on me in natural light. I'm hoping to try the Perfect Harmony foundation, and possibly some skin care products as well. I'm eyeing the Apricot Cleansing oil.

I have very dehydrated skin, which in turn over-produces oil. I've had acne since I was eleven, but it's gotten wayyy better now. As a result, I have a lot of scarring -- both newer, redder ones and more faded brown ones. I've always used heavier formulations for other MMU's, should I do the same with SN? I also use both the foundation and a lavender colour corrector to conceal. I'd like to stay pretty matte.
Prom, using liquid foundation

Close-up of my neck/chest area which I'd like to match. Done under dim light, lightbulb.

Same circumstances, I'm on the right.

The only recent close, outdoor shot I have. I'm wearing Meow's Korat #2 mixed with Angora #3, and some EDM Golden Winged Butter... Pretty much just mixing whatever yellowish foundation samples I had into my Korat to make it look better.

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For the night of Halloween, I plan on going as a creepy ghost girl, complete with cold, blue skin. I was looking to mix some ivory foundation with a small amount Ultramarine Blue for the effect. Is one refill baggie enough to cover my limbs, neck and face? I'm about 4ft 11. Also, does it matter what formulation I use for this? The goal is to look dead.
I look forward to joining the SN customer base, thanks for all your help in regards to my questions!