Based on your query for an angler fish cartoon with the color #123656 , I’ve created a color palette that complements this deep oceanic hue while capturing the whimsical nature of a cartoon. Here’s the color palette:

 <Angler Fish Cartoon> 
1. Deep Sea Blue - 
                            
                            #123656
                         - A dark, rich blue reminiscent of the deep ocean waters.
2. Coral Reef - 
                            
                            #FF6F61
                         - A vibrant coral pink that adds a playful contrast, simulating the colorful marine life.
3. Neon Green - 
                            
                            #39FF14
                         - A bright, glowing green that can represent the bioluminescent lure of the angler fish.
4. Sunlit Yellow - 
                            
                            #F6EB61
                         - A cheerful yellow that brings warmth and liveliness to the palette, perfect for cartoon elements.
5. Shadow Black - 
                            
                            #2C2C2C
                         - A deep, neutral black for outlines and details, providing depth to the cartoon design.

This palette combines deep ocean tones with vibrant colors to evoke the whimsical and mysterious world of an angler fish, making it ideal for a cartoon style.

Would you like help with specific design elements for your angler fish cartoon, or do you have something else in mind?