Unlike ash gray, you know from Pokemon, we're talking about color here. It's been very fashionable lately. Everybody gets their hair dyed. Ash gray color HEX code above.
#F3F6F4
#E3E8E3
#C9D1CA
#B2BEB5
#7A8D7F
#5B6E61
#45564B
#37453C
#2D3831
#262E29
#151917
Related: Gray Gradients