| Bits | Description |
|---|---|
| 7:0 | Transparency colour value (soft reset = 0xe3) |
* Note: This value is 8-bit, so the transparency colour is compared against the MSB bits of the final 9-bit colour only.
* Note: This colour only applies to Layer 2, ULA and LoRes. Sprites use nextreg 0x4B and the tilemap uses nextreg 0x4C for transparency except in text mode