Remove/change style class

Summary:

Our customer would like to change the text size and colour of salary amount and currency on all pages in HCM, every page from viewing info, to salary increases, promotions etc, on all roles. They do not want the salary information to stand out, it should be black text and the same size font, as all other info on the page. In responsive UI the salary is displayed in a bigger font and sometimes in orange font.

Is there a way that I can change this on a global level? I know that it can be done using page composer, but there is a large number of pages that will to be edited.