fix color bug

[maclandrol]

Checklist:

• [ ] Add tests to cover the fixed bug(s) or the new introduced feature(s) (if appropriate).
• [ ] Update the API documentation is a new function is added or an existing one is deleted.
• [x] Added a news entry.
  • copy news/TEMPLATE.rst to news/my-feature-or-branch.rst) and edit it.

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[codecov[bot]]

Codecov Report

Merging #176 (f8fad52) into main (64a84aa) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #176   +/-   ##
=======================================
  Coverage   91.13%   91.13%           
=======================================
  Files          47       47           
  Lines        3529     3529           
=======================================
  Hits         3216     3216           
  Misses        313      313           

Flag	Coverage Δ
unittests	91.13% <ø> (ø)

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