Simply download a CSS file and replace the one in Bootstrap. No messing around with hex values.
Bootstrap themes are released under the MIT License and maintained by the community on GitHub.
Themes are built for the latest version of Bootstrap. Version 2 and others are also available to download.
Changes are contained in just two LESS or SASS files, enabling modification and ensuring forward compatibility.
An API is available for integrating with your platform. In use by NodeBB, BootSnap, and others.