Makeup foundation shade help!

For the fall/winter months I’ve been using elf Halo Glow Liquid Filter in shade Fair underneath shade L12 in Merle Norman Flawless Effect Liquid Foundation Broad Spectrum SPF 15.

I am wanting to switch to the rare beauty foundation but I am confused on which shade to pick. The shade finder says 230N but I don’t know.

I am a fair light color, my veins are blue/green.