Please add the ability to enter an exact HEX or RGB color for the spine in Cover Creator, including narrow spines on books under 80 pages.

Currently, the spine color can only be chosen visually with the color slider, and background images cannot be applied to narrow spines. This makes it difficult to match the spine precisely to an existing front and back cover.

For branded or professionally designed covers, exact color matching is important even when the spine is too narrow for text. Adding HEX/RGB input, and ideally the option to apply a background image or color sampled from the cover, would allow short paperback covers to be completed entirely within Designrr without needing to rebuild the full cover in another program such as Canva.