fix padHex

[mk-wang]

#24

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3526a94) 85.27% compared to head (f9a04af) 85.28%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #25   +/-   ##
=======================================
  Coverage   85.27%   85.28%           
=======================================
  Files          77       77           
  Lines        7009     7011    +2     
=======================================
+ Hits         5977     5979    +2     
  Misses       1032     1032           

Files	Coverage Δ
SwiftDraw/Parser.XML.Color.swift	97.67% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[swhitty]

Thank you 🙏🏼