This puzzle is easier to solve when you compare the four edges of the empty space rather than focusing on the color.
The missing piece needs three outward tabs and one inward curved opening. None of the choices appears to match perfectly in its current position, so the key is realizing that the correct piece can be rotated.
When the piece marked 88 is turned 90 degrees clockwise, its tabs and opening align with every side of the gap in the lion.
Answer: 88


