Added more testes for the hex_to_rgb function

[sebi06]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.65%. Comparing base (7d0ea80) to head (94f1c99).
Report is 4 commits behind head on main.

❌ Your project status has failed because the head coverage (64.65%) is below the target coverage (100.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
+ Coverage   64.51%   64.65%   +0.13%     
==========================================
  Files          23       23              
  Lines        1863     1870       +7     
==========================================
+ Hits         1202     1209       +7     
  Misses        661      661              

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