[kimikage]

Fixes #183
This does not change the return type. (cf. Issue #213)

This also specializes the cases for AbstractGray and where p==2.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.05%. Comparing base (09119c4) to head (7b4227e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #214      +/-   ##
==========================================
+ Coverage   98.00%   98.05%   +0.05%     
==========================================
  Files           3        3              
  Lines         250      257       +7     
==========================================
+ Hits          245      252       +7     
  Misses          5        5              

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[kimikage]

julia> @btime norm(rgb) setup=(rgb=rand(RGB{Float32}));
  27.309 ns (0 allocations: 0 bytes) # before
  9.000 ns (0 allocations: 0 bytes)  # after

julia> versioninfo()
Julia Version 1.13.2
Commit 45b6d15e34 (2026-10-14 20:33 UTC)
Build Info:
  Official https://julialang.org release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 8 × 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
  WORD_SIZE: 64
  LLVM: libLLVM-20.1.8 (ORCJIT, tigerlake)
  GC: Built with stock GC
Threads: 1 default, 1 interactive, 1 GC (on 8 virtual cores)