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[Color Relationship Function Generator Thing]

This is pretty sweet: this "Color Relationship Function Generator Thing" takes two hex colors and produces the scss function(s) required to transform the first color into the second. I input #ff2900 and #b01c00 (the menu ribbon and ::before colors) and got darken( #ff2900, 15 )

http://ethanmuller.github.io/sass-color-function-generator-thing/