Styling, Css?

I love the calendar.. works great.. throws an error when I tried to use the plugin for forms.. but works..

The only thing is this

https://www.harleydavidsonalaska.com/harley-davidson-events-around-alaska/

I cannot figure out how to edit the text color for the numbers and heading… it is white! so, cannot figure out what file to edit to change?
Help please.

Thank you for all you do, will probably buy the paid version later down the road as I test this one.

https://www.ads-software.com/extend/plugins/sugar-calendar-lite/