@rinternals{OctavateEight},
@rinternals{clef-interface}.
+@knownissues
+Ottavation numbers attached to clefs are treated as separate grobs. So
+any @code{\override} done to the @var{Clef} will also need to be
+applied, as a separate @code{\override}, to the @var{OctavateEight}
+grob.
+
+@lilypond[fragment,quote,relative=1]
+\new Staff \with {
+ \override OctavateEight #'color = #red
+ \override Clef #'color = #blue
+}
+
+\clef "treble_8" c4
+@end lilypond
+
@node Key signature
@unnumberedsubsubsec Key signature