Use the options in the Edge Color area to select and set the color and material options for a selected edge.
Use the Color Mode menu to select either the object’s material or a custom color. Select the Custom Color option to specify your own edge color using the RGB Color fields. Select the Material Color option to base the edge color on the Diffuse and Ambient colors set in the Material settings.
Use the Color settings to change the color of the edge. The Color field is only available when Custom Color is selected in the Source field.