I was making some colour palettes this evening and thought it might be fun to do a challenge where you're given a selection of predefined palettes.

For example:
Fungal Colour Palettes by Neyjour.png

1- You then choose just one of those palettes and use it to make your map (any type).

2- In your opening thread you must specify which one you chose (by name, number, or however they're defined).
Or, perhaps the palettes could be posted by the challenge organizer as individual images, and you simply upload your chosen one to your opening thread.

3- And you must use all the colours in your chosen palette.

Also, maybe allowances could be made for:
* Using other colours in a very minimal capacity, for things like: icons, labels, border, etc.
* Using lighter/darker shades of your palette colours, as long as the primary colour is also used.
For example, you use the dark blue from your palette for the darkest shading of your mountains, but you also use lighter shades of that blue for the lighter/highlighted parts of the mountains.