Nikon D3300 - Manual (Page 148)

128 P, S, A, and M Modes
2
Fine-tune white balance.
Use the multi selector to fine-tune white balance.
3
Save changes and exit.
Press
J.
Coordinates
Increase green
Increase
blue
Increase
amber
Increase magenta
Adjustment
A White Balance Fine-Tuning
The colors on the fine-tuning axes are relative, not absolute. For
example, moving the cursor to B (blue) when a “warm” setting such
as
J (incandescent) is selected will make photographs slightly
“colder” but will not actually make them blue.