The brand EX1 makes foundations specifically for olive/yellow based skintones. The Invisiwear Foundation line ($12.50 GBP) is a win for me as my skintone is very olive.
The shade 4.0 is described as a yellow based olive shade for medium skin tones. Finding the right shade is everything in a foundation and thats the main benefit for me of this.
The finish is a natural matte, I get a medium buildable coverage and it sits well under my other products. Although is not a game changing formula or wont become my holly grail it’s nice and if you’re in the market for an olive foundation i’d give this one a try. This is beauty swatched approved