Added option for theme-color.

[george-bobby]

Details on issue #465 and discussion #466

Fixes:

Added option for theme-color

🚨 Please review the guidelines for contributing and our code of conduct to this repository. 🚨 Please complete these steps and check these boxes (by putting an x inside the brackets) before filing your PR:

• [x] Check the commit's or even all commits' message styles matches our requested structure.
• [x] Check your code additions will fail neither code linting checks nor unit test.

Short description of what this resolves:

Added option for theme-color

Proposed changes:

• Added option in readme for theme-color

👍 Thank you!

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.