The Grey range of Colors.
rgba(211, 211, 211) #D3D3D3
rgba(169, 169, 169) #A9A9A9
rgba(128, 128, 128) #808080
rgba(105, 105, 105) #696969
rgba(192, 192, 192) #C0C0C0
rgba(119, 136, 153) #778899
rgba(112, 128, 144) #708090
rgba(47, 79, 79) #2F4F4F
rgba(0, 0, 0) #000000
rgba(220, 220, 220) #DCDCDC