Organizer’s phone no appears in white in Safari browser

Hi,

In Safari (iPhone, ipad, Mac) the organizer’s phone number appears in white over light grey and can’t be seen at all. On other browsers and devices the font colour is the default dark grey.

Thank you,

P.S.: If your solution involves css please tell me where I can find the plugin’s css file.

The page I need help with: [log in to see the link]