| Color | TF Class | TF Class # |
|---|---|---|
| Homeo domain factors | 1 | |
| Basic leucine zipper factors (bZIP) | 2 | |
| C2H2 zinc finger factors | 3 | |
| Fork head/winged helix factors | 4 | |
| Other C4 zinc finger-type factors | 5 | |
| Basic helix-loop-helix factors (bHLH) | 6 | |
| CRC domain | 7 | |
| DM-type intertwined zinc finger factors | 8 | |
| Nuclear receptors with C4 zinc fingers | 9 | |
| SMAD/NF-1 DNA-binding domain factors | 10 | |
| Tryptophan cluster factors | 11 | |
| Unknown | 12 |