Hello Don,

Thank you for reaching out to us.

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

There is no option in Amelia to make this transparent so this is really strange and we are looking in to it and as soon as we have more information we will contact you again in this ticket. 

Hello again Don,

We are sending you a custom CSS that you need to apply to this page where this happens

.am-event__btn {
  background: white !important;
}
.amelia-app-booking #amelia-booking-wrap #am-event-calendar-page.am-wrap .am-event-header__title,.amelia-app-booking #amelia-booking-wrap #am-event-calendar-page.am-wrap .am-event-upcoming__heading, .amelia-app-booking #amelia-booking-wrap #am-event-calendar-page.am-wrap .am-event-upcoming__heading div{
  color: white !important; 
}

Custom code needs to be applied to the page where the booking form is. Depending on what you're using (Gutenberg blocks, or some page builder), adding the CSS or JS can be done in a few different ways. 

If you need help with adding custom CSS to the page, please take a look at this article.

If you need help with adding custom JS to the page, please take a look at this article.

This should help.

We wish you all the best.

Have a nice day.