Color is represented as a four-element array. The four elements represent values for red, green, blue, and alpha in that order. Values range from 0 through 255. If color is undefined for a symbol, the color value is null.
Referenced by: attributeColorInfo, Background, Color Ramp, ColormapInfo, colorStop, Dot Density Renderer, Effect Functions, Flow Renderer, heatmap colorStop, othersThresholdColorInfo, Pie Chart Renderer, Simple Fill Symbol (esriSFS), Simple Line Symbol (esriSLS), Simple Marker Symbol (esriSMS), Text Symbol (esriTS)