I found this list here:
- Serve fruit beers at 40-50° F.
- Serve wheat beers and pale lagers at 45-50° F.
- Serve pale ales and amber or dark lagers at 50-55° F.
- Serve strong ales, such as barley wines and Belgian ales, at 50-55° F.
- Serve dark ales, including porters and stouts, at 55-60° F.
I keep my fridge at 50° F because it's right in the middle. Since I bottle, I just let the darker beers sit out for a little to warm up before drinking.