Gray
 
About these coordinates     Color coordinates
Hex triplet#808080
sRGBB (r, g, b)(128, 128, 128)
HSV (h, s, v)(0°, 0%, 50%)
CIELChuv (L, C, h)(54, 0, 0°)
Source[Unsourced]
B: Normalized to [0–255] (byte)

Gray (or grey) has the standard hex code #808080 (128/128/128), although numerous variations exist that have different values.