FormatConditions.AddColorScale Method (Excel)
Returns a new ColorScale object representing a conditional formatting rule that uses gradations in cell colors to indicate relative differences in the values of cells included in a selected range.
Color scales are visual guides that help you understand data distribution and variation. A color scale helps you identify relative differences in the values of cells in a given range by using color variation. Different colors and gradations between colors represent differences in cell values. For example, in a three-color scale, you can specify that cells with the highest relative data values are green, cells with intermediate values are yellow, and cells with the lowest values are red.