Howard, Frank: Colour, as a means of art: being an adaptation of the experience of professors to the practice of amateurs (London, 1838)

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CHAPTER I.

SECTION III.

TONE.

This is a term also borrowed from the vocabulary
of Music, to denote a property or quality of Colour,
the opposite of gaudiness or harshness: and implies
a richness or sobriety, inviting quiet contemplation.
It confers what is technically termed repose. It
bears that relation to colours in general, that the
quality of a musical note does to that of an
unmusical sound or mere noise. In Music, this is
known to depend upon the vibrations of the air
being isochronous or at regular intervals. Should
it be discovered that Colours are also produced by