Ramp Generator is an add-on from TFMSTYLE that fills ColorRamp nodes with generated colors. Select a ColorRamp in the Shader, Geometry, Compositor or Texture Node Editor and generate a set of colors in one click, with a custom color count from 2 to 32 and randomized color positions.
It offers several color modes, including complimentary and random colors, greyscale, and stripes. Colors can also be sampled from an image, and it includes a custom color preset library.
The add-on runs on Blender 4.2 LTS and newer and requires no special permissions. It is released under the GNU General Public License v3.0 or later, and the current release is version 1.4.3. It can be added by dragging it into Blender or installing from disk.