You can add some custom CSS rules to change the color. Without knowing your theme it is difficult to advise specifically. Everything the calendar displays is behind a class that you can target to change the color.
tesseract theme. Text too feint, hard to see. Bold that still retains the category colors and font rather than reverting to the default theme would be great.
https://sheridanprobus.ca/calendar-draft-spf/
To make all text in the calendar bold is simple:
.spiffy {
font-weight: bold;
}
Works great with full width page template in use. When R sidebar used with it’s content also displayed, then calendar and “upcoming events” text reverts to dark gray, not bold and no colors for categories. ?Thanks
Try this:
.sidebar-right article .spiffy span {
color: unset;
}