1.If the diagram is in a document or a worksheet, double-click on the diagram to open it.
2.Double-click the fill that you would like to set for the color gradient.
2D Columns: On the Columns/Bars tab, under Fill, select Color Gradient in the Type field.
2D Surface: On the Fill tab, select Color Gradient from the Fill style field.
3D Column, 3D Surface, 3D Waterfall: On the Fill tab, select Color Gradient or Color Spectrum from the Fill style field.
3D Waterfall: To fill the area under the curves with a color gradient, click on the Fill tab and select Color Gradient or Color Spectrum from the Fill Style field. To add a color ramp to the lines of a curve, select Color gradient or Color spectrum from the Coloring field on the Connection Line tab.
3D Space Curve: To add a color gradient to the symbols, click on the Symbols tab, select the option Fill and select Fill style Color Gradient or Color Spectrum.