Color.FromArgb Method (Int32, Int32, Int32)
Creates a Color structure from the specified 8-bit color values (red, green, and blue). The alpha value is implicitly 255 (fully opaque). Although this method allows a 32-bit value to be passed for each color component, the value of each component is limited to 8 bits.
Assembly: System.Drawing (in System.Drawing.dll)
The green component value for the new Color. Valid values are 0 through 255.
red, green, or blue is less than 0 or greater than 255.
Iterates through a range of alpha values, changing the alpha value of a color.
During each iteration, sets the color of a brush to the modified color and paints a rectangle to show the color.
Repeats steps 2 and 3 for each primary color.
The alpha value is never fully opaque and the rectangles overlap so you get color-combination effects.
Available since 1.1