It depends. As an avocado ripens, it goes through several very distinct stages of color change. It has more chlorophyll content than ripe fruit when it is very green. Then as the avocado ripens further, it will become darker and develop a deeper green color. At around 70% of maximum ripeness, an avocado will go from dark to light green, indicating that it's turning over to the next stage. As an avocado matures even more, its skin will turn yellow-green or browner in color - this indicates high amounts of carotenoids which are indicators of ripe fruit. It's easy to tell when an unripe avocado is ready because its dark spots start turning yellowish-brown in color.