Color Property
Returns or sets the primary color of the Border object, Font object, or the Interior object. Use the RGB function to create a color value. Read/write Variant.
expression.Color
expression Required. An expression that returns an object in the Applies To List.
Example
This example sets the color of the tick-mark labels on the value axis.
myChart.Axes(xlValue).TickLabels.Font.Color = RGB(0, 255, 0)