Most primitives provide standard properties to set their color and translucency. The color property should be set using the .NET ColorTranslator class as shown below:

CopyC#

using System.Drawing;
IAgGxPrimitivePolyline line = new AgGxPrimitivePolyline();
line.Color = (uint)ColorTranslator.ToOle(Color.Honeydew);

Most primitives can be opaque or translucent (partially visible). This is controlled via the Translucency property. A Translucency of 0% means the primitive is completely opaque, while a Translucency of 100% means the primitive is completely transparent.

CopyC#

IAgGxPrimitivePolyline line = new AgGxPrimitivePolyline();
line.Translucency = 50;

Both the color and translucency can be set in a single call using the SetRGBA method. This uses red, green, blue and alpha components to define the primitive's color and translucency. All components are in the closed range 0 to 255, where 0 is least intense and 255 is most intense. The alpha component defines opaqueness, the opposite of translucency. A low alpha value means the primitive is mostly translucent and a high alpha means the primitive is mostly opaque.

CopyC#

IAgGxPrimitivePolyline line = new AgGxPrimitivePolyline();
line.SetRGBA(255, 0, 0, 127);   // Translucent red