Nikon D750 DSLR Camera (Body Only) - Manual (Page 342)

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The color space determines the gamut of colors available for
color reproduction.
sRGB is recommended for general-purpose
printing and display; Adobe RGB , with its broader gamut of
colors, for professional publication and commercial printing.
Color Space
G button
➜
C photo shooting menu
A
Adobe RGB
For accurate color reproduction, Adobe RGB images require
applications, displays, and printers that support color management.
A Color Space
ViewNX 2 (supplied) and Nikon’s Capture NX-D software ( 0 268)
automatically select the correct color space when opening
photographs created with this camera. Results can not be guaranteed
with third-party software.