This closes #1369, support set, and get font color with theme and tint

[strivek]

PR Details

Description

Related Issue

Motivation and Context

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #1370 (9e76b8b) into master (3d02726) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1370   +/-   ##
=======================================
  Coverage   98.45%   98.45%           
=======================================
  Files          31       31           
  Lines       23526    23544   +18     
=======================================
+ Hits        23162    23180   +18     
  Misses        242      242           
  Partials      122      122           

Flag	Coverage Δ
unittests	98.45% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
chart.go	100.00% <ø> (ø)
cell.go	97.59% <100.00%> (+<0.01%)	⬆️
drawing.go	99.66% <100.00%> (ø)
styles.go	100.00% <100.00%> (ø)

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[xuri]

LGTM, thanks for your contribution.