This issue is automatically created based on existing pull request: #31831: Update color code to lowercase follow less standards

Description (*)

https://devdocs.magento.com/guides/v2.4/coding-standards/code-standard-less.html#hexadecimal-notation
Small change in less code base in order to make code following magento less standards

In scope of this PR only change in less file only! While in magento code base someother place (file css, phtml..) still mix between uppercase and lowercase for color string

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes magento/magento2#<issue_number>

Manual testing scenarios (*)

1. Run deploy content
2. View output file css and search color string related change

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)