Grain colour
RHS colour codes are given in parentheses beside the descriptor states
| Code | Term | Description |
|---|---|---|
| 1 | White | White group 155D, 155C, 155B, 155A |
| 2 | Yellow | Yellow group 6D,6C,6B,6A |
| 3 | Red | Orange-red group 33C,33B,33A,165B,165A |
| 4 | Brown | Greyed-orange group 164B,164A,165B,165A |
| 5 | Buff | Greyed-orange group 166B |
| 6 | Other | In the descriptor notes 4.4 |