File saved by Mandelbrot Explorer, an application that allows users to visualize Mandelbrot Set and Julia Set fractals; contains the color scheme for the visualization; supports storage of bitonal, grayscale, and color patterns; may also store a scheme that was randomly generated by the application. MXCS files are used to overlay a color scheme onto different zoom levels of a generated fractal image. They can also be reused for applying the same look and feel to multiple images. MXCS files are stored in an XML format. NOTE: Color scheme files were previously saved with the .FRC extension in Mandelbrot Explorer version 2.5 and earlier.