Color is not claimed as a feature of the mark.
The mark consists of the letter "M" and the letter "D", capitalized, with a sub-scripted glossy letter "R". The Bell of a stethoscope rests on the top right of the "D", the tubing of the stethoscope then loops down and passes through and below the "R", looping back up to the right on top of the right "leg" of the "R", culminating with earpieces on the right of the "R". The words, "ENTERPRISES, INC." are capitalized in a small font under the letters "M" and "D".
MD RX ENTERPRISES, INCORPORATION