Here’s a complementary palette composed of seven low-contrast colors that maintain good readability with black text:

 <Low Contrast Readable Palette> 
1. Soft Butter Yellow - 
          
          #F2E6A6
        - A gentle, light yellow that brings warmth without overwhelming brightness.
2. Lavender Mist - 
          
          #D5C6E0
        - A muted lavender that adds a soft touch of elegance and calmness.
3. Powder Blue - 
          
          #A3C1D4
        - A soft blue that evokes tranquility while remaining easy on the eyes.
4. Blush Pink - 
          
          #F2B2B2
        - A light, pastel pink that adds warmth and charm without high contrast.
5. Sage Green - 
          
          #B7D9A0
        - A subdued green that brings a sense of nature and freshness.
6. Coral Blush - 
          
          #F2A1A1
        - A soft coral that adds a warm touch while remaining low in contrast.
7. Light Lilac - 
          
          #E4C6E1
        - A pale lilac that contributes to the softness of the palette and maintains readability with black text.

This palette features low-contrast colors that are soft and harmonious, ensuring that black text is readable against each hue.

How does this palette fit with your design needs? Would you like recommendations on where to use these colors effectively?