Precondition:

• Safari browser
• Dark or high-contrast dark theme

Steps to reproduce:

• Open any page with disabled fields e.g. Administration->Authentication->SAML settings
• Enable fields via the 'Enable SAML authentication' checkbox
• Insert some values in enabled fields
• Disable SAML authentication via the checkbox
• Check disabled fields

Result:

e.g. from other places:

Expected: example from chrome browser