Use any of these color variables as they are or reassign them to more meaningful variables for your project.
All colors available in Bootstrap 4, available as Sass variables and a Sass map in our
Main Colors with Opacity from 0.1 to 0.9 for example
Colors are often used for social media.
Grayscale colors provide quick access to commonly used shades of black while semantic include various colors assigned to meaningful contextual values.
Very helpful colors useful in the design of elements on bright backgrounds.