Color Palette
In a conic palette:
Hue is rotating the color
Chroma is the saturation which goes from white to the color
Value is the brightness which goes to the color to black
The Hue must be chosen by selecting the colours close to each other on the color wheel. Like Red, Scarlet and Purple.
Complementary colours are the opposite. Like Red and Green. This is used to create highlights.
To vary the brightness of the colour, keep the hue and saturation constant.
How art choices affect mood
Desaturation is good to create a dark and scary mood.
Very close Hue colours and low saturation for a grungy mood.
Complementary colours and high saturation is for cartoony looking mood.
High saturation and bright looks photorealistic grungy state getting with the lower saturation.
Unifying Colour
Ensure colours will look pleasant
Consistent with your desired mood
Less 'noise' by limiting colours