Yes, but that requires changing some specific CSS, not just the value of the variable.
The selector for the headings is .ics-calendar-month-grid th
, so you could write some CSS like this:
.ics-calendar-month-grid th {
color: red;
}
The value red
can be a named CSS color, a hex or RGB value (e.g. #ff0000
or rgb(255,0,0)
), or another variable (e.g. var(--r34ics--color--gray)
).