Classification of numbers: Colour type

Colour	Numbers	Description
Black	0	Zero is a black number. There aren't many of these.
White
Red	1, 2	These numbers are red. They feel scholarly. Reliable and trustworthy.
Orange
Yellow	3	These numbers are yellow. Weak.
Green
Blue
Purple	6, 36
Pink
Grey

Classification of numbers: Danger ranking

Danger Level	Numbers	Description
None		These numbers are pacifists, weak, and can do no harm, they don't want to do harm.
Neutral		These numbers do not shy away from violence when absolutely necessary.
Moderate	1, 2	Intentions are not always clear, approach with caution.
Quite		Known to be dangerous, avoid interaction if it can be helped.
Extreme	0, 6	These numbers are very dangerous, and can deal serious damage. They may be skilled in certain magical arts, or practice some other kind of offensive power.