The Design team has identified 4 button categories and assigned a color to represent each category. Below is an explanation of these categories and the colors / usage cases that fall within each.
The 4 categories are as follows:
Engage with Site Content — PMS Blue
Dark background — Steel 50
Sign Up for Newsletters — Gold 700
Respond to a Census Survey — Forest 700
System Call to Action
System Command — Azul 700
Dark background — Primary 50
System Request — Coral 600
Engage with Site Content:
PMS Bluehello
PMS Blue has a LARGE TEXT AAA rating = 4.91
“Engage with Site Content” is referring to a default button with no specific job other than to allow the user to engage with various content and navigation on the site.
“System Command” refers to a situation where the user is giving the system a command . “Take me there” “create this for me” “download content for me” etc.
This category has a lot of various usage scenarios, so for outlying CTA such as interacting with a form / map etc., there are Secondary Azul buttons, as well borrowed System Alert Banner colors such as red and green for commands like “stop” and “finish”.