The Zorn palette is characterized by its limited yet vibrant colors, primarily consisting of yellow ochre, cadmium red, ivory black, and white. To create a blue that complements this palette effectively, I suggest a muted, earthy blue that harmonizes with the warm tones of the Zorn palette.

 <Zorn Complementary Blue> 
1. Soft Cerulean - 
          
          #4A90E2
        - A muted blue that provides a cool contrast to the warm tones of the Zorn palette, evoking calmness and serenity.
2. Dusty Navy - 
          
          #2C3E50
        - A deep and subdued navy blue that adds depth and sophistication, balancing the brightness of the Zorn colors.
3. Slate Blue - 
          
          #6A8EAE
        - A versatile blue with gray undertones that maintains a natural feel, complementing the earthy tones of the Zorn palette.
4. Steel Blue - 
          
          #4682B4
        - A medium blue with a slight gray shade, offering a cooler counterpoint that still feels grounded.
5. Powder Blue - 
          
          #B0E0E6
        - A light, airy blue that introduces a touch of freshness while still harmonizing with the warmth of the Zorn colors.

This color palette features a selection of blues that can enhance the overall aesthetic when paired with the Zorn palette, offering both contrast and harmony.

What specific application do you have in mind for this color palette? Are there any particular design elements you’d like me to consider?