shemeam hi, you can change that in your template that is loaded with the T4 pagebuilder page.... e.g. look at the T4 blank theme settings (page section) an change the "Link color" and "Link Hover color" values....
Or look in the Layout settings of T4 blank template at the Palettes section of the block that contains the "component" block. In this example the T4 blank is the default template that is used.