open as admin cmd // notepad "C:\Program Files (x86)\Microsoft SQL Server\130\Tools\Binn\ManagementStudio\ssms.pkgundef" // notepad "C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\ManagementStudio\ssms.pkgundef" // notepad "C:\Program Files (x86)\Microsoft SQL Server Management Studio 18\Common7\IDE\ssms.pkgundef" notepad "c:\Program Files (x86)\Microsoft SQL Server Management Studio 19\Common7\IDE\ssms.pkgundef" Find the string "// Remove Dark theme". Comment next line. Run "ssms.exe". Tools > Options > Environment > General > Color theme > Dark
Tools → Options → Environment → Fonts and Colors Show settings for: Environment Font: Cascadia Code Extra Light 12