Elf Acne fighting foundation in Buff and Sand swatches

I recently bought the foundation in Sand and realized it is not the right color. It is way darker than it appears online. Thankfully, Elf is nice enough to send me another one in Buff, which is almost my exact match.

Sand and Buff. Look almost the same from the outside

Sand and Buff. Sand does not look as dark but don't let the picture deceive you

Sand is way darker than Buff