Fix bad color value for Gauge 'Needle' type

[charlesh88]

Closes #7820

• Fix 0 opacity fill in theme constants files for Gauge type needle.
• Theme constants in Espresso, Snow and Maelstrom fixed.

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Author Checklist

• Changes address original issue?
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Reviewer Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.96%. Comparing base (a8fbabe) to head (052ce57).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7821      +/-   ##
==========================================
- Coverage   57.23%   56.96%   -0.28%     
==========================================
  Files         675      675              
  Lines       27287    27287              
  Branches     2671     2671              
==========================================
- Hits        15618    15543      -75     
- Misses      11333    11408      +75     
  Partials      336      336              

Flag	Coverage Δ
e2e-ci	61.81% <ø> (+0.04%)	⬆️
e2e-full	23.51% <ø> (-18.39%)	⬇️
unit	49.35% <ø> (ø)

see 8 files with indirect coverage changes

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[akhenry]

@jvigliotta to review
@unlikelyzero to update visual test

[jvigliotta]

This looks pretty straightforward!

[davetsay]

@unlikelyzero to write visual test