The mark consists of two lower case letter "i"'s whereby both tittles are replaced by one circle consisting of four different colored quadrants, namely; red, yellow, purple and blue, separated by blank space between each quadrant and blank space in the center of the circle, which hovers centered above both vertical stems followed by the capital letters "ESI". In smaller font, the words "International Institute for Energy Systems Integration" appear to the right of the stylized "iiESI" so that "International Institute" appears on the first line, "for Energy Systems" appears on the 2nd line and "Integration" appears on the third line and all three lines of text together are the same height as the larger stylized "iiESI". All font appears in black text with the exception of the stylized tittle.