Use this feature to vary icon and line colors over a range of data values. For example, mapping wave heights across all tracked locations of a given wave glider mission to determine at a glance where waves are relatively higher and lower according to their respective colors. Or mapping the time of the tracked locations from the first (earliest) to last (most recent) measurement locations.
with multi-colors showing time of a tagged tiger shark, ranging from pink (start) to yellow (finish):
without color variation, all icons and lines selected as white: