[Darkmatter] Style Changes Pt. 2

[rukmini-bose]

Closes

Describe your changes:

• Various fixes to style, color, font size, etc.

All Submissions:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Is this a notable change that will require a special callout in the release notes? For example, will this break compatibility with existing APIs or projects that consume these plugins?

Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
• Has this been smoke tested?
• Have you associated this PR with a type: label? Note: this is not necessarily the same as the original issue.
• Have you associated a milestone with this PR? Note: leave blank if unsure.
• Testing instructions included in associated issue OR is this a dependency/testcase change?

Reviewer Checklist

• Changes appear to address issue?
• Reviewer has tested changes by following the provided instructions?
• Changes appear not to be breaking changes?
• Appropriate automated tests included?
• Code style and in-line documentation are appropriate?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.91%. Comparing base (4ee68cc) to head (6f4ac30).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7739      +/-   ##
==========================================
- Coverage   57.21%   56.91%   -0.30%     
==========================================
  Files         674      674              
  Lines       27283    27283              
  Branches     2668     2668              
==========================================
- Hits        15609    15529      -80     
- Misses      11336    11416      +80     
  Partials      338      338              

Flag	Coverage Δ
e2e-full	23.52% <ø> (-18.47%)	⬇️
e2e-stable	60.82% <ø> (-0.01%)	⬇️
unit	49.52% <ø> (ø)

see 8 files with indirect coverage changes

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[charlesh88]

LGTM