A continuous color scale is used to represent quantitative values. For values \(u \in [u_{min}, u_{max}]\), a mapped color can be obtained by linearly interpolating the color value from a color lookup table. Specific applications might require a particular interpolation scheme, such us logarithmic scale.
It is possible to choose different color scales. By moving the mouse over the color scale, one can see the colors' corresponding hex-code and rgb values.