Red is the color of the beating heart, So Red is definitely an obvious choice if you are choosing now to wear Red on Valentine's day.
However, on the other way traditional Valentine's colors are pink and Red. Pink is symbol of Love & kindness while Red reflects of desire. Red and Pink being colors that are often associated with love and desire. If you are uncomfortable looking too red...you don't have to wear an all red outfit, combining it with other colors will either tone it down if you want to wearing your favorite colors you can still expose the symbol of Love with the color "Red" such as use red nail paint or with "Red" accessories!