Changing colour of Testimonial display text

Hi
I recently switched to beaver builder and beaver builder theme and all is going well apart from the fact that my testimonials rotator display as a gray colour and I cannot find a way to change the display colour other than to edit each testimonial in the editor. Is there an easy way to add some CSS or something to make them display white rather than grey? you can see the problem here near the bottom of the page

http://inter-activ.co.uk

Gavin

https://wordpress.org/plugins/hms-testimonials/