This coloring page depicts an old, spooky castle that is known as the Hotel Transylvania. The tower is tall, with tall, pointed roofs, lots of windows and a big, heavyset door that looks foreboding. In front of the door stands Frankenstein – big, green, and stitched up like a patchwork quilt. He looks like he is waiting for someone, with his arms crossed, and an eerie expression on his regal face.
For this coloring page, I would choose a color palette of bright tones to emphasize the spookiness of the Hotel. The tower could be colored a deep red or burgundy, while the accents around the door could be gray or charcoal colored to give it a somber feeling. The windows can be a pale yellow, to add in a bit of warmth and life. Frankenstein can be a vibrant green, with stitching outlines of a dark navy or black to make them stand out. The sign for the hotel can also be a brighter color to give the page a final pop of vibrancy.