Yes and Yes.
First buff out an area on the fenders to get to the true color, then,
go to a paint supply that has the alternate chips for your paint code.
Some codes have several.
Match up the closest one to your cars fenders out in the sun.
You may get close enough to not blend the fenders, it's
a judgement call.
Even paint out of the same can may look different another time
depending on how it's sprayed.
Even the pressure setting on the gun can make a difference.
Generally higher pressur will lighten it.
Afterwards, buff out the fenders real good.