Flash of unstyled content while welcome page loads

• Type: Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: None
• Component/s: ~ [Archived] Frontend Infrastructure
• Labels: None
• Epic/Theme:
  • FI_Additional_Work
• Sprint: S03E15 - Roubaix
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/82128

When you hit DXP as a logged-out user you will see a flash of blue before the predominantly orange/brown welcome image appears due to this CSS on the hello world portlet:

#4885b7 url(../images/portlet_hello_world/welcome_bg.jpg) bottom left;

We should adjust that blue to better match the hue of the welcome image itself.

See the attached screenshots.