You can give colors the you choose and Bootstrap 4 basicly. Also there is possible to give any color with data-bgcolor for backgrounds and data-color for texts. A few examples;

Note: You can customize label sizes with classic button options, Qootstrap 4 & Quadra helper classes. You can easily edit borders and radius sizes, backgrounds, typography, ie the entire picture.

Auto Sizing: If you don't give any size options to labels, it will get sizes of parent element. You can easily use them in the titles, subtitles or paragraph texts.

Documentation and examples for badges, our small count and labeling component.

Badges can be used as part of links or buttons to provide a counter.

Using the contextual .badge-* classes on an element quickly provide actionable badges with hover and focus states.