Boilerplate (non-editable) lines are shaded #f3f4f6; author lines are white.
The current row is highlighted below on both an author line and a
boilerplate line. Dial the current-row colour until it's clearly distinct from the
boilerplate gray in both cases, then copy the hex.
#f3f4f6Row 5 = current row on an author line; Row 8 = current row on a boilerplate line. Both use the dialed colour, so you can confirm it reads as "current row" against white and against the boilerplate gray at once.