Any good auto paint place should be able to mix up what you want. Take them a sample.. ash tray/ glove box door, for example.
If you are going to paint the dash frame and steering column use whatever matches, but when you paint the dash pad add a “flattener” to the paint. A glossy paint on the dash pad reflects sunlight straight into your face.
FYI, Flatteners, hardeners , anti-fisheye, additives should be readily available at the auto paint store. They should also have flex additives and stuff to help paint bind to plastics. Talk to them; most are very knowledgeable.