For a running expo show in Holland, we want to capture the energy, athleticism, and the vibrant Dutch landscape. Here's a color palette that blends these elements together beautifully:

1. **Tulip Red**
   - Hex: 
          
          #C3083F
       
   - Description: A vivid red that captures the essence of Holland's famous tulips. This color symbolizes energy and passion, perfect for the dynamic nature of a running expo.

2. **Canal Blue**
   - Hex: 
          
          #507DBC
       
   - Description: Reflecting the serene blues of the Dutch waterways, this color provides a calming contrast to the palette. It represents the clarity and focus needed in running.

3. **Field Green**
   - Hex: 
          
          #679436
       
   - Description: Inspired by the lush, green landscapes of Holland's countryside, this vibrant green echoes the outdoor spirit of running and the connection to nature.

4. **Sunrise Orange**
   - Hex: 
          
          #FFA500
       
   - Description: A bright, warm orange that evokes the feeling of a fresh start and the early morning sunrises over Dutch horizons. It brings a sense of optimism and energy, perfect for motivating runners.

This palette combines the heartfelt warmth of Dutch landscapes with the energetic spirit of a running expo, creating an inviting and motivating atmosphere for participants and attendees alike.