SCSS, also known as Sass (Syntactically Awesome Style Sheets), is a popular preprocessor for CSS that extends the capabilities of traditional CSS by introducing features like variables and functions. In SCSS, functions and variables are important features that enhance the capabilities of CSS and make it more powerful and flexible.
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According to wikipedia, a color scheme is the choice of colors used in various artistic and design contexts. For example, the "Achromatic" use of a white background with black text is an example of a basic and commonly default color scheme in web design.