Text color. The default colour of the text used in (all) note text. Default is: #000000 (black). Inherited by $TextColor attribute.
Once text is added to $Text, its style—at time of entry—is saved in the TDF data and so it is unaffected by subsequent changes to $TextColor. Re reset a note's $Text to use a (new) $Text colour, select all $Text—or that to be repaired—and use menu Format ▸ Style ▸ Standard Font. (N.B. there must be a $Text selection for this to work)