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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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.85%. Comparing base (21a4335) to head (950c49f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7821      +/-   ##
==========================================
+ Coverage   56.05%   56.85%   +0.79%     
==========================================
  Files         674      674              
  Lines       27283    27283              
  Branches     2669     2669              
==========================================
+ Hits        15293    15511     +218     
+ Misses      11651    11433     -218     
  Partials      339      339              

Flag	Coverage Δ
e2e-ci	61.05% <ø> (+5.56%)	⬆️
e2e-full	23.52% <ø> (-31.60%)	⬇️
unit	49.38% <ø> (-0.04%)	⬇️

see 61 files with indirect coverage changes

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