Foundation match issue??? Help me?

[TylerTremallose]

Hi everyone! 
I have a foundation matching issue going on that someone maybe can help me out with!

So I THINK I got this in my Play Box, but I have a deluxe sample of the Sephora Matte Perfection Powder Foundation and was wanting to get a full size. 
One issue with it though. It looks good at first on my skin, however after about 20 min, it looks like I went tanning, which I dont exactly want it to look like that. 

The color is 26 which is "neutral sand". ..so since it is a neutral shade (going off my Fenty shade which is 260 and also a neutral), should I go with 20? That shade would be "neutral beige".

Trying to do the Color IQ match gives me the shade 56, which is WAYYY too dark. 

Any tips or hints? Going to an actual Sephora store is out of my way and 99% of my purchases from Sephora are online...so any help would be nice! 

[GG84]

Hi @TylerTremallose

I would probably suggest switching to a different foundation unless you want to take a gamble on the shade. Oxidation is a chemical reaction when oxygen is mixed with your foundation it causes a colour shift.