Original subtitles

There are several ways that we can change colors in Blender, just like in an image editing

program.

A useful way to alter colors, is with the Hue Saturation Value node, which is listed

in the menu as just Hue/Saturation.

As the name indicates, this node allows us to change the hue, saturation, and value of

a color.

This could either be a single color, or a whole color texture.

A Hue of 0.5 represents the original hue of the input color, and changing this up or down

will rotate the hue in either direction, reaching the opposite hue at either end of the slider.

Meanwhile, the Saturation and Value parameters keep the input unchanged with a value of one.

Raising or lowering these will, as expected, increase or decrease the saturation and value

of the color.

The Factor input blends between the original color and the output color, so we can use

it to, for example, add variation to the color by feeding a varying texture into the the

Factor.

But note that modulating the factor is not the only way to vary the result, as we can

always plug textures into the actual Hue, Saturation, and Value inputs as well.

Another very useful node for color manipulation, is the Mix RGB node.

By default, this node allows us to blend between the two color inputs by changing the factor.

A factor of zero outputs the first color, and a factor of one outputs the second, and

anything in between is a mix of the two.

This also allows us to mix colors or textures based on a mask texture.

But the Mix RGB node also has other modes.

These are just like the color blending modes you would find in an image editing program,

though personally I don't use many of them, as they are not that useful for physically

based shading, and most don't actually make much sense in the context of mixing light,

which is ultimately what we are going.

The Mix mode is by far the most useful one, but a few others have their uses as well.

Notably, the Multiply mode can be used to change the color brightness.

This is especially handy if we plug a Value input node into the second socket.

Now, if we set the factor to one, the Value input works exactly like the Value field of

the Hue/Saturation node.

This is a good trick for when we want to change only the color brightness, without any need

for hue and saturation as well.

Note that in any mode other than mix, the factor blends between the first color input,

and the resulting color with the selected operation applied.

Lastly, the Color Ramp node is a bit different.

It allows us to map a number of colors on top of an input range.

It takes a Value input in the zero to one range, and maps a value of zero to the leftmost

color, and a value of one to the rightmost color.

With the plus button, we can add more colors in between, and they'll get interpolated according

to the selected interpolation mode.