| Color | TF Class | Number |
|---|---|---|
| Tryptophan cluster factors | 1 | |
| AP2/EREBP | 2 | |
| GCM domain factors | 3 | |
| Basic leucine zipper factors (bZIP) | 4 | |
| Other C4 zinc finger-type factors | 5 | |
| Basic helix-loop-helix factors (bHLH) | 6 | |
| C3H(C) | 7 | |
| TCP | 8 | |
| Homeo domain factors | 9 | |
| B3 | 10 | |
| C2H2 zinc finger factors | 11 | |
| MADS box factors | 12 | |
| Heat shock factors | 13 | |
| CPP | 14 | |
| Fork head/winged helix factors | 15 | |
| A.T hook factors | 16 | |
| C3H zinc finger factors | 17 | |
| BBR/BPC | 18 | |
| EIL | 19 | |
| LEAFY | 20 | |
| Other all-alpha-helical DNA-binding domains | 21 | |
| RWP-RK | 22 | |
| Unknown | 23 | |
| * | Unvalidated |