Coloring Ledger Lines

[David B. Stocker]

Hello everyone,

Does anyone know why the ledger line color in this example isn't reverted like the other grob colors?

\relative c' {

\override Staff.NoteHead.color = #grey

\override Staff.Stem.color = #grey

\override Staff.LedgerLineSpanner.color = #grey

a4 a a a

\revert Staff.NoteHead.color

\revert Staff.Stem.color

\revert Staff.LedgerLineSpanner.color

a a a a

}

Thanks,

David