"In this article we will take a look at some more color
grading techniques including:
Colorizing with Hue Adjustment
High Dynamic Look
Toning Up and Toning Down Colors
Creating a Sepia Tone
"Colorizing with hue adjustment
"For a quick and dirty colorization of images, hue adjustment is
your best friend. However, the danger with using hue adjustment is
that you don't have much control over your tones compared to when
you were using color curves.
"To add the hue adjustment node in Blender's Node Editor Window,
press SHIFT A then choose Color then finally Hue Saturation Value.
This will add the Hue Saturation Value Node which is basically used
to adjust the image's tint, saturation (grayscale, vibrant colors),
and value (brightness). Later on in this article, you'll see just
how useful this node will be. But for now, let's stick with just
the hue adjustment aspect of this node."