Themes and Colors

Themes and Colors

Bootstrap\'s theme system provides a consistent way to express contextual colors and adapt component appearance across a design.

Core concept

Explain theme color variables, contextual utility classes, text-bg helpers, color modes, and the difference between semantic theme tokens and arbitrary hex values.

Using it in a real interface

Create a small palette for primary, success, warning, danger, and neutral surfaces. Explain how semantic tokens make it easier to update the visual identity without hunting through individual components.

Implementation notes

Do not create a different color for every component. A restrained semantic palette produces a more coherent interface and makes accessibility testing manageable.