Here's a color palette suitable for a mental wellness brand, focusing on soothing and uplifting colors that can contribute to a sense of calm and positivity:

1. Serenity Blue
   - Hex Code: 
          
          #92A8D1
       
   - Description: A soft, calming blue that invokes a sense of peace and tranquility, perfect for creating a serene atmosphere.

2. Mindful Mauve
   - Hex Code: 
          
          #9F99AA
       
   - Description: A muted lavender hue that encourages reflection and inner calm, offering a subtle touch of warmth and comfort.

3. Harmony Green
   - Hex Code: 
          
          #B8D5B8
       
   - Description: A gentle green reminiscent of new growth and rejuvenation, helping to promote balance and harmony.

4. Optimistic Yellow
   - Hex Code: 
          
          #FFD966
       
   - Description: A cheerful, sunny yellow that brings a burst of optimism and positivity, stimulating mental clarity and happiness.

5. Soothing Coral
   - Hex Code: 
          
          #F4ACB7
       
   - Description: A soft, nurturing coral pink that lends a sense of compassion and care, ideal for a welcoming and supportive environment.

6. Meditative Grey
   - Hex Code: 
          
          #C3C6C8
       
   - Description: A neutral, grounding grey that provides a backdrop for contemplation and mindfulness, anchoring the palette with stability.

Palette Description: This mental wellness palette combines gentle and nurturing colors that evoke tranquility, balance, and positivity. It's designed to create a soothing environment that aids in mental clarity and emotional well-being.