Just like with your foundation, take a good look in the mirror to see what undertones may be peaking through at you in the mirror.
Seeing a slight pink? Yellow? Red?
Fair skin with pink undertones will want to lean towards Blue-Based reds. Think almost 50’s pinup style red or reds with a hint of magenta undertone. This will really help to brighten a fair complexion the most.
Another bonus to using a Blue-Based red is that it instantly gives you that “I just whitened my teeth” look without going to the dentist.