Here’s a color palette designed for a flat color design, starting with the hex code #EFA3A3 , including a yellow background, white, a cool baby blue, and darker blues that evoke the feeling of water.

json
{
  "palette_name": "Water-Inspired Flat Design",
  "colors": [
    {
      "name": "Soft Pink",
      "hex_code": "
                            
                            #EFA3A3
                        "
    },
    {
      "name": "Sunny Yellow",
      "hex_code": "
                            
                            #FFEA00
                        "
    },
    {
      "name": "Pure White",
      "hex_code": "
                            
                            #FFFFFF
                        "
    },
    {
      "name": "Cool Baby Blue",
      "hex_code": "
                            
                            #A2DFF7
                        "
    },
    {
      "name": "Deep Blue",
      "hex_code": "
                            
                            #005F85
                        "
    },
    {
      "name": "Ocean Blue",
      "hex_code": "
                            
                            #007B9A
                        "
    },
    {
      "name": "Navy Blue",
      "hex_code": "
                            
                            #003D5B
                        "
    }
  ]
}

In this palette:

• The soft pink ( #EFA3A3 ) serves as your starting color.
• The sunny yellow ( #FFEA00 ) is bright and cheerful, perfect for a background.
• Pure white ( #FFFFFF ) adds brightness and contrast.
• The cool baby blue ( #A2DFF7 ) provides a refreshing touch.
• The deeper blues ( #005F85 , #007B9A , #003D5B ) represent the varying depths of water.

If you have any further adjustments or additional colors in mind, feel free to let me know!