The color(s) black, white and green is/are claimed as a feature of the mark.
The mark consists of Black, White and Green. The mark "powerbox" is in a black box, in verdana bold font, all in lower case, and there is no space between "power" and "box". "power" is in black (usually represents Hot) against white (usually for neutral) background, and "box" is in green (usually as ground). This color scheme can also be used in text, whenever possible. The Black box has thinner top (1) than bottom (2) and wider sides (3). When green is not realistic (for instance silk printing or in case of embossing stamp on metal), will have just black/white color.
POWER BOX