- Bottlenose dolphins: Light gray to dark gray, with a lighter belly.
- Spinner dolphins: Dark gray to black on top, with a white belly and sides.
- Spotted dolphins: Dark gray or black with white or yellow spots.
- Atlantic spotted dolphins: Black or dark gray on top, with a creamy white or pale gray belly and white or yellow spots.
Markings:
- Most dolphins have a light-colored stripe or blaze on their snout, which is often called a "melon".
- Some dolphins have stripes, spots, or other markings on their body.
- Bottlenose dolphins sometimes have a dark line running from their eye to the corner of their mouth.