Color is not claimed as a feature of the mark.
"R2"
The mark consists of a single lined square box consisting of four sides, adjoining at the top left corner, the bottom left corner, and the bottom right corner, but not at the top right corner; the lower case letter "r" in the middle of the box with the number "2" set above in a superscript manner on the top right hand side, positioned where the top right corner of the single lined square box would otherwise be located.
R SQUARED