Font and color on the left side (license etc.) are all wrong.
No horizontal lines above the columns on the right.
As far as I can tell Zbynek Konecny, this has been resolved by the latest changes to the https://jenkins.io/projects/blueocean/ page. Can you confirm it is resolved?
I'm afraid the issues from this ticket are still on the BO page + the header style is wrong now.
https://github.com/jenkins-infra/jenkins.io/pull/2337 should fix both.