Use black as background color.
Use blue as background color.
Use cyan as background color.
Use green as background color.
Use magenta as background color.
Use red as background color.
Use white as background color.
Use yellow as background color.
Make the output bold.
Use black as foreground color.
Use blue as foreground color.
Use cyan as foreground color.
Use green as foreground color.
Use magenta as foreground color.
Use red as foreground color.
Use white as foreground color.
Use yellow as foreground color.
Underline the output.
These are some terminal style flags you can use when creating your debugging categories to make them stand out in debugging output.