| Kind | Value | annotation | ||
| enumeration | 0_RHS Colour Chart indicate reference number | |||
| enumeration | 1_white | |||
| enumeration | 2_yellow | |||
| enumeration | 3_orange | |||
| enumeration | 4_pink | |||
| enumeration | 5_red | |||
| enumeration | 6_purple | |||
| enumeration | 7_violet | |||
| enumeration | 8_other color indicate which |