color
what defines the hue of the characters
Nonprintable characters
The hues of the characters are defined by specifying the RGB (red, green, blue) values that create the desired color. Each color component can range from 0 to 255, indicating the intensity of that particular color in the final hue. Combining these values in different proportions produces a wide range of colors for characters.
Color
In typesetting computers or initialising printers yes you could call it character formatting or print formatting
In the formatting pallet, under "Font Size"
They are unprintable formatting characters. They indicate line and paragraph breaks for instance.
Character formatting
Character Formatting
Character formatting
Font color