The color(s) dark blue for the letters A,B,C and S; dark cyan for the beads forming the U character; grey for the three rods stringing the beads is/are claimed as a feature of the mark.
The mark consists of the stylized word "ABACUS". Dark blue letters for the letters A,B,C and S. For the letter U, it is stylized to resemble the rods and beads of a chinese abacus, Dark Cyan for the beads forming the U character, Grey for the three rods stringing the beads.