| More docs on the ARB website. See also index of helppages. Last update on 22. May 2026 .

Main topics: ARB: a Short Introduction Glossary | Related topics: Group all but color group Colorize listed species Mark color groups What are Marked Species? Configure color groups
# What are color groups? DESCRIPTION NOTES ## DESCRIPTION
### Color groups are groups of species (genes, experiments, ..). Every species can only belong to ONE color group. ### All species of one color group are displayed in the same color in the tree display.
## NOTES
### The colors used to display can be customized with 'Properties/Tree: Color and fonts/Edit color groups' ### It's possible to toggle between marks and colors using 'ARB_NTREE/Species/Colors'