Over fizzy is referred to as "gushers", and we have all gone through that at least once. Before you bottled, did you take hydro reading at least three days apart without change? If so, then something may have gotten a slight infection. Also, at the end of your room temperature bottle conditioning, did you leave them in the fridge for a week or close to it? Cold liquids absorb gas better. As far as color goes, generally speaking the type of grain controls that, but extra long boils can darken the wort too. You don't say how many batches of beer you have brewed, but if they are all gushers, you are doing something constantly "wrong". If you are new, don't beat yourself up too badly. It takes practice to produce good bear every single time, and even the seasoned pro's i'm sure, have an troublesome batch now and then.