Nikon D300 Complete Manual page 356

Red, green, and blue are each 120º away from each other, as
are cyan, yellow, and magenta. Normally you'll see color
wheels drawn as continuous variations (there's a range of
oranges between yellow and red, for example), but I'm
showing it this way for a reason I'll get to in a minute. Grand
total, we can move the hue about 18º around the circle using
the controls on the D300; that's about one-third of the way
between any of the two colors I show in the wheel, above.
Thom Hogan's Complete Guide to the Nikon D300
Hue +3 (+9°). Look
closely at the reds.
They're redder. Also
note the yellows have
a bit of green to them.
Hue -3 (-9°). Now the
reds are headed
magenta while the
yellows are trending
orange. The biggest
issue is that the blues
are going cyanish.
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