Bootstrap has a LOT of colors, not just primary, secondary, etc...
https://getbootstrap.com/docs/5.3/customize/color/#theme-colors
The current Bootstrap 5 list of colors (should work for Bootstrap 4 as well.)
bootstrap color palette colors
:root {
--bs-blue: #0d6efd;
--bs-indigo: #6610f2;
--bs-purple: #6f42c1;
--bs-pink: #d63384;
--bs-red: #dc3545;
--bs-orange: #fd7e14;
--bs-yellow: #ffc107;
--bs-green: #198754;
--bs-teal: #20c997;
--bs-cyan: #0dcaf0;
--bs-white: #fff;
--bs-gray: #6c757d;
--bs-gray-dark: #343a40;
--bs-primary: #0d6efd;
--bs-secondary: #6c757d;
--bs-success: #198754;
--bs-info: #0dcaf0;
--bs-warning: #ffc107;
--bs-danger: #dc3545;
--bs-light: #f8f9fa;
--bs-dark: #212529;
--bs-font-sans-serif: system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","Liberation Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";
--bs-font-monospace: SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;
--bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
}
To use them you set up a class and then call it. For example, indigo:
<style>
.text-indigo { color: var(--bs-indigo); }
</style>
<div class="text-indigo">This would render in indigo color.</div>
