Picking your new hair color clocks in as the No. 1 most daunting beauty task of them all. As if selecting the shade of nail polish for your next manicure or landing on a lipstick color for the day ...

So, what exactly is ash brown after all? It's a cool-toned brunette shade with gray, purple, blue, or even green undertones. Some call it "mushroom brown," others opt for simply "cool brown." However, ...