Make an appointment with a hair stylist for a Consultation. Sometimes they're free - check first.
Ask them what shades they would recommend. They often have better stuff available than what is in stores.
You don't have to get it done there, but it will at least give you some ideas. Sometimes a shade or two lighter/darker can make a huge difference.
Or, check with your drugstore's cosmetician about any products that rinse out in a few days. That's what they're there for! And they can help you pick one that would suit your skin tone.