Go to an expensive hairdresser and get a $200 dye job like ladies do. In fact, ask your favourite SP where she and her friends go when they want to change colour.
There are 2 ways to reverse grey hair. First way, get a $20.00 bottle of hair dye and smear it on your hair and look like an idiot. Everyone will know that you dye your hair and that you do not have the intelligence and good taste to do it properly. In fact, your hair will look monotone, dull and lifeless, as if your spread cheap shoe polish on it.
Second way, spend $$$ and do it right. Your hair will be subtle, vibrant and natural and you will look like a million $.
I'm salt and pepper and give no shit about it. But many of my lawyer friends want the "ageless" look and spend big to get it. There's a world of difference when it is done right.