New color system - QA issues

[pavish]

Description

This issue tracks bugs with the new color system introduced in #4563. More items will be updated in this list as maintainers come across bugs.

• This color is weird on the form fill out page (Reported by @seancolsen in Standardize colors #4563)
  
• Fix distinction between control and input styles for Dropdowns.
  • This results in issues like these. Context here.
• Regression in the styling of SSO buttons in the login page #4796