Online Style Guide missing?
There used to be a page probably named "TYPO3 Web Styleguide" where the TYPO3 colors where listed, fonts, and other things.
On the page https://typo3.org/project/brand/style-guide/, if you click on the second box from the left ("Online Style Guide"), the URL https://styleguide.typo3.org/patternlab/public/index.html leads you back to the same page.
Google still shows some of the original content in the snippet: