The mark consists of the words "REN.NU PKD NUTRITION PROGRAM" with the word "REN.NU" shown in larger font above the words "PKD NUTRITION PROGRAM" and a kidney-shaped design covering the letters "NU" with the letters :NU" in a different color than the kidney-shaped design, where there is no claim to any particular color for any of the words, designs, or elements.
Color is not claimed as a feature of the mark.