A name space in Haskell is a module, and GHC only allows one module per file.
So I would put these in a separate file, or do manual namespacing using prefixes, as in "colorRed".
What are you trying to gain here by having the color namespace?
I want to avoid polluting the global namespace and to avoid name collisions.
As I said, the example with the colours wasn't probably a good one.
Let me change the question: How can I create a sub-namespace in the same file?
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