Although difficult to see the flat area of the dome, it is about 1/2" diameter circle. The color looks to be pretty accurate on my monitor. I would like to call it green, but it is much different in color than spectru slides for Hemi. green. The closest I can suggest would be dark lime. Embossing is, front skirt (HEMINGRAY-9), and rear skirt (MADE IN U.S.A.).