This is a diverging colormap that linearly varies between red (+) white (=0) and blue(-).
Just observe the figure
Diego Andrés Alvarez Marín (2021). Red White Blue Colormap (https://www.mathworks.com/matlabcentral/fileexchange/86932-red-white-blue-colormap), MATLAB Central File Exchange. Retrieved .
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Inspired by: Red Blue Colormap
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