apply button on career site while candidate apply

Summary:

how and where we can modify the color this apply button

Content (please ensure you mask any confidential information):

When a candidate clicks on a job listing, another window should appear. In this window, there should be an 'Apply' button that stands out with bold text and a black background color.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):