Ikos has this uber cool set of "thinking lipsticks " that reacts to the pH of your skin by changing colors and adapting to your skin tone.
The black turns from light purplish pink to fushia while the white changes from frosty white to light pink to lavender pink to cotton candy pink.
I am notorious for carrying at least 2-3 lipsticks/lipglosses around. This might just be the solution to declutter and carry one universally flattering color for all my skin tones in between seasons.
The black reminds me of Halloween for sure :)
They are $20 each and can be bought at