Update Tailwind CSS colors in configuration

[akshayram1]

I've changed the colors 'black-1000' and 'gray-1000', and I've added custom colors 'custom-black', 'custom-gray', and 'custom-blue'

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[codecov]

Codecov Report

Merging #669 (4086649) into main (78dd1e1) will not change coverage.
Report is 18 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #669   +/-   ##
=======================================
  Coverage   18.26%   18.26%           
=======================================
  Files          59       59           
  Lines        2743     2743           
=======================================
  Hits          501      501           
  Misses       2242     2242           

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[dartpain]

Thank you so much,

Why do we have to remove
'gray-4000': '#949494',
'gray-5000': '#BBBBBB',
'gray-6000': '#757575',

Also there is currently a conflict in branch, can you resolve it please