Here is a nature-inspired color palette reflecting the concept of a capsule fashion collection for Swiss Sportswear brand On, taking inspiration from the female menstrual cycle. This palette consists of 5-7 colors that embody the natural aspects and emotional tones associated with the cycle, including both bold and subtle shades.

{
  "palette_name": "Cycle Harmony",
  "colors": [
    {
      "name": "Earthy Clay",
      "hex_code": "
                            
                            #CFAF8D
                        "
    },
    {
      "name": "Soft Rose",
      "hex_code": "
                            
                            #F2B2C1
                        "
    },
    {
      "name": "Forest Green",
      "hex_code": "
                            
                            #4B8B4A
                        "
    },
    {
      "name": "Calm Blue",
      "hex_code": "
                            
                            #A4C8E1
                        "
    },
    {
      "name": "Golden Dawn",
      "hex_code": "
                            
                            #F4B400
                        "
    },
    {
      "name": "Deep Plum",
      "hex_code": "
                            
                            #6F3C8A
                        "
    },
    {
      "name": "Muted Tan",
      "hex_code": "
                            
                            #D1B19A
                        "
    }
  ]
}

Palette Description:

1. Earthy Clay ( #CFAF8D ): This warm, neutral tone reflects the earthiness and grounding aspect of nature, symbolizing the connection to femininity and nurturing.

2. Soft Rose ( #F2B2C1 ): A gentle, soft pink that embodies tenderness and compassion, resonating with the emotional nuances during the menstrual cycle.

3. Forest Green ( #4B8B4A ): This bold green signifies growth, renewal, and vitality, representing the natural rhythms and cycles present in both nature and the female body.

4. Calm Blue ( #A4C8E1 ): A soothing blue that promotes tranquility and peace, reminiscent of serene waters, symbolizing the calmer phases of the cycle.

5. Golden Dawn ( #F4B400 ): A vibrant yellow that captures the essence of energy and positivity, akin to the feeling of revitalization and new beginnings during the cycle.

6. Deep Plum ( #6F3C8A ): A rich, bold color that embodies strength and empowerment, reflecting the confidence and assertiveness that can emerge through different phases.

7. Muted Tan ( #D1B19A ): A subtle, earthy tone that represents stability and comfort, providing a grounding element to the palette.

Each color in this palette serves to evoke the various emotional and physical aspects of the female menstrual cycle, creating a cohesive and inspiring collection for active wear that resonates with nature and femininity.

Would you like to explore how these colors can be applied in specific designs or any other details related to the collection?