1. Deep Blue Sea - 
                            
                            #0B6E8F
                         - This rich, deep blue evokes the feeling of being submerged in the ocean depths. It's a calming and serene color that will help users stay focused and relaxed while using the free diving app.

2. Coral Reef - 
                            
                            #FF7F50
                         - A warm and inviting shade of orange, this color represents the vibrant life and energy of a coral reef. It's a great accent color to add some pop and excitement to the app's design.

3. Sunburst Yellow - 
                            
                            #FEDC56
                         - This bright and cheerful yellow is reminiscent of the sun's warm rays beaming down on the ocean's surface. It adds a sense of energy and optimism to the app's palette.

4. Seafoam Green - 
                            
                            #8FBC8F
                         - This soft and soothing green is inspired by the gentle waves and foam of the ocean. It's a calming color that helps users feel at ease while using the app.

5. Slate Gray - 
                            
                            #708090
                         - A cool, neutral gray that represents the strength and stability of the ocean. It's a great background color that will help other colors pop and stand out.

6. Royal Purple - 
                            
                            #6B3FA0
                         - This rich and regal shade of purple adds a touch of elegance and sophistication to the palette. It's a great color for highlighting important information or features within the app.

7. Sand Dune - 
                            
                            #C2B280
                         - A warm and earthy color that represents the sandy beaches and shores of the ocean. It's a great accent color that adds a natural and organic feel to the design.

8. Ocean Spray - 
                            
                            #7FB3D5
                         - This light and refreshing blue-green color is inspired by the misty spray of the ocean waves. It's a calming and peaceful color that will help users stay focused and relaxed while using the app.