| Flower | Line Color | Euclidean metric in L*a*b* rejecting L* | Color similarity function [6] |
| 0 | Blue | 60% (position 7) Increases at 45˚ | Immune |
| 1 | Green | 30% (position 4) Increases slowly and progressively | Immune |
| 2 | Red | 40% (position 5) Sharply increases | Immune |
| 3 | Cyan | 70% (position 8) Increases at 45˚ | Immune |
| 4 | Purple | 20% (position 3) Increases slowly and progressively | Immune |
| 5 | Yellow | 50% (position 6) Sharply increases | Immune |