Color is not claimed as a feature of the mark.
The mark consists of the design element of a prism with the literal element "D" on the top portion of the prism, "SL" in the front portion of the prism, and "EEP" on the side of the prism, forming the element "DEEP SLEEP".
D SLEEP
The wording "D SL EEP" has no meaning in a foreign language.