Update Patch repr

[d-chambers]

Description

This PR tweaks the default style for string representation of various patch component so they are readable on dark and light backgrounds.

Checklist

I have (if applicable):

• referenced the GitHub issue this PR closes.
• documented the new feature with docstrings or appropriate doc page.
• included a test. See testing guidelines.
• your name has been added to the contributors page (docs/contributors.md).
• added the "ready_for_review" tag once the PR is ready to be reviewed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (875902a) 98.86% compared to head (da655aa) 99.53%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #342      +/-   ##
==========================================
+ Coverage   98.86%   99.53%   +0.66%     
==========================================
  Files          91       91              
  Lines        7242     7242              
==========================================
+ Hits         7160     7208      +48     
+ Misses         82       34      -48     

Flag	Coverage Δ
unittests	99.53% <100.00%> (+0.66%)	⬆️

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