bootstrap4 color scheme

Quick answer：

Bootstrap 4 color scheme is a collection of predefined color palettes used in Bootstrap 4, a popular front-end framework. It includes various shades and tones of colors for backgrounds, text, borders, and other UI elements, ensuring a consistent and aesthetically pleasing look across web pages. Common color scheme properties include primary, secondary, success, danger, warning, info, light, dark, and muted colors.