The Minimum color scheme tracks the minimum distance of the orbit points to the real axis, imaginary axis, or the origin, and colors the point respectively.
Using the minimum to the real axis,
Using the minimum to the imaginary axis,
Using the minimum to the origin,
If one zooms in and playes with the palette, some very interesting images can appear.
Note: This coloring scheme does not tend to work very well in a convergence bailout mode. Although, this method does produce interesting images for many types of fractal families, not just the polynomial-like fractals. As with curvature, you will want to use a larger bailout radius, here 1000 or so usually does the trick, again depending on the what system is being graphed. The smaller radius has a tendency to cut off the spikes that are common in this coloring scheme.