Some people have both reddish-bluish and yellow undertones to their skin.
They are usually on the darker side of medium, and look somewhat more burnt
sugar orange in winter, and dark reddish brown in summer. Some shift
almost completely between cool and warm depending on the season and their
age. If you're somewhat dark, but you and others can tell very well
when you're blushing, this might be you.
The truth is that you're a warm, but for some reason, even though you've
got plenty of melanin, your skin surface didn't form the kind of thickness
shield that other warms, some even lighter skinned than you have.
You probably have dry sensitive skin too, so take care to moisturize morning
and night, and to use gentle cleansers. It's suggested that you only
clean your face with cool water or a non lathering wipe-off cleanser, and
do peeling (exfoliation) *only* once a week. You may also benefit
from nightly vitamin enriched serum application under your night cream.
You can wear both cool and warm colors, but test anything before you
buy. You would do well to keep a collection of kits because your
tones change with the seasons and with age. So you'll need black,
navy blue, and dark brown eyeliner. Also, get a variety of lipsticks.
For you, the best is to buy lipstick and/or gloss in pots, and many brushes
so that you can mix colors to suit your needs.