| Bits | Description |
|---|---|
| 7:0 | Colour for the palette index selected by nextreg 0x40. The format is RRRGGGBB - the lower blue bit of the 9-bit colour will be the logical OR of blue bits 1 and 0 of this 8-bit value. After the write, the palette index is auto-incremented to the next index if the auto-increment is enabled in nextreg 0x43. Reads do not auto-increment. Any other bits associated with the index will be zeroed. |