Thank you for Rashida
However, it doesn't seem to work. I have included your code - with the 'green' and with 'purple' for the text color but there is no change. (I expected an extreme, pronounced color change - not what I want but what I couldn't miss seeing). I did this in the template options custom css code block. They still come out blue on hover. I have looked into the items when in 'inspect', I can see the definition of the item .sppb-btn-custom but it is difficult to catch the hover. I tried then to remove the 'hover' to see if the non-hover display would show these wild colors - no change there either. It seems that the custom overrides are not working at all.