wat wat? I think you understand the pic I made wrong.
The different coloured blocks are seperate corpses, which then get combined. The numbers in the middle is amount of colours.
I think I understand what conceit was trying to say.. hopefully this diagram represents his comments.
The coloured hexagonal areas are individual collabs, each using a 16 colour palette. The grey tiles in between them form a 'bridge' and only those tiles utilise both (or all three) neighbouring palettes (as shown by the colour indicators in the middle of the grey hexes)
The grey 'bridge tiles' can be done as a separate challenge to link a couple of hex collabs. Perhaps where anyone can attempt them and the best tiles from that challenge are then used as the bridge tiles.
This way, any collab can use any palette and you don't have to worry about repeating a palette to keep the colour count in a more central collab down. In your diagram, although your central one has 48 colours, that would mean that several collabs around it need to a lot of the same colours. This is perhaps a little limiting from a design point of view, and perhaps less of a challenge than using a fresh unfamiliar palette.
-Z-