Here’s an “ugly” color palette that features colors often considered unappealing or unconventional, yet can create unique and interesting designs:

 <Ugly Colors> 
1. Sludge Brown - 
          
          #4A4A2D
        - A murky brown that resembles muddy water, often seen as unattractive.
2. Pea Green - 
          
          #8C9B2A
        - A yellowish green reminiscent of split pea soup, which some find off-putting.
3. Baby Poop Yellow - 
          
          #C4B600
        - A dull, mustard yellow that is often associated with unpleasant imagery.
4. Dusty Rose - 
          
          #D66E8C
        - A muted pink that can appear faded or dirty, lacking vibrancy.
5. Murky Gray - 
          
          #7B7B7B
        - A dull gray that lacks energy, bringing a washed-out feeling to designs.

This color palette is intentionally unconventional and can be used to create designs that are quirky, humorous, or make a statement about beauty in the unconventional.

Would you like to explore specific applications for this palette, or do you have any other themes in mind?