Show More Than 20 Colors in Edit Color Dialog

Issue

In the Edit Color dialog, only the first 20 colors in a palette appear.

In the Color Legend, select the drop-down in the upper-right hand corner
Select Edit Colors
In the pop-up dialog only 20 colors will appear in the color palette, even if there are over 20 available colors in the palette

Environment

Tableau Desktop

Resolution

Option 1. Split the Palette
Split the color palette into multiple custom color palettes of no more than 20 colors
Example:
<preferences>
       <color-palette name="My Categorical Palette 1" type="regular">
       <color>#eb912b</color>
       <color>#7099a5</color> ....
  </color-palette>
<color-palette name="My Categorical Palette 2" type="regular">
       <color>#FFFFFF</color>
       <color>#FFFAFA</color> ....
  </color-palette>
</preferences>

See the article on Creating Custom Color Palettes

Option 2. Auto-Assign the palette
While only 20 colors may appear, all colors exist in the palette and will be assigned when using the Assign Palette option in the Edit Colors dialog.