Clusters of Orthologous Groups (COGs) are sets of orthologous protein-coding sequences that can be used to rapidly assign functional annotations to whole genome sequences. In this article, we provide a table that contains the COG initial, its color code, and its function name.
| COG Initial | Hex Color Code | Function Name |
| J | #ff0000 | Translation, ribosomal structure and biogenesis |
| A | #c2af58 | RNA processing and modification |
| K | #ff9900 | Transcription |
| L | #ffff00 | Replication, recombination and repair |
| B | #ffc600 | Chromatin structure and dynamics |
| D | #99ff00 | Cell cycle control, cell division, chromosome partitioning |
| Y | #493126 | Nuclear structure |
| V | #ff008a | Defense mechanisms |
| T | #0000ff | Signal transduction mechanisms |
| M | #9ec928 | Cell wall/membrane/envelope biogenesis |
| N | #006633 | Cell motility |
| Z | #660099 | Cytoskeleton |
| W | #336699 | Extracellular structures |
| U | #33cc99 | Intracellular trafficking, secretion, and vesicular transport |
| O | #00ffff | Posttranslational modification, protein turnover, chaperones |
| C | #9900ff | Energy production and conversion |
| G | #805642 | Carbohydrate transport and metabolism |
| E | #ff00ff | Amino acid transport and metabolism |
| F | #99334d | Nucleotide transport and metabolism |
| H | #727dcc | Coenzyme transport and metabolism |
| I | #5c5a1b | Lipid transport and metabolism |
| P | #0099ff | Inorganic ion transport and metabolism |
| Q | #ffcc99 | Secondary metabolites biosynthesis, transport and catabolism |
| R | #ff9999 | General function prediction only |
| S | #d6aadf | Function unknown |
