Here’s a color palette inspired by your request, featuring a starting color of #EFA3A3 along with yellow, white, baby blue, and darker blues to resemble water:

json
{
  "palette_name": "Water-Inspired Flat Colors",
  "colors": [
    {
      "name": "Soft Pink",
      "hex_code": "
          
          #EFA3A3
       "
    },
    {
      "name": "Sunny Yellow",
      "hex_code": "
          
          #F9E26B
       "
    },
    {
      "name": "Pure White",
      "hex_code": "
          
          #FFFFFF
       "
    },
    {
      "name": "Baby Blue",
      "hex_code": "
          
          #A3D1E8
       "
    },
    {
      "name": "Deep Blue",
      "hex_code": "
          
          #2A9DAB
       "
    },
    {
      "name": "Navy Blue",
      "hex_code": "
          
          #1A5E7E
       "
    },
    {
      "name": "Dark Teal",
      "hex_code": "
          
          #005F73
       "
    }
  ]
}

This palette combines soft and vibrant colors that can evoke a sense of calmness and warmth, perfect for a flat color design.

Would you like to explore more color options, or do you need assistance with a specific design project?