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

60 ABSTRACT PRINCIPLES.

derive pleasure or amusement from it, the doubtful
or questionable hypotheses will be left untouched,
and those points only brought forward, which are
calculated to eusure success.

For this purpose the amateur should avoid
greenish blues, and greenish yellows; they both
appear sickly : and never place such a green between
blue and yellow as would result from the mixture of
the particular tints of those two colours which are
made use of.

Both blue and yellow become agreeable as they
incline to red. Hed becomes rich as it inclines
to blue, brilliant as it inclines to yellow. All
shades and tones of purple or orange are agreeable;
but of greens, those only which incline to yellow.
Bluish greens require either to be very pale, as
shewn in Turner's first principle (see Plate), or
moderated with black, so as almost to cease to be
colours and become tones. All shades and tints of
the tertiary compounds, are agreeable in their
places, they receive value by the opposition of the
colour which enters least into their composition,
and become difficult to manage only, when they
approach full bluish green.

White and black give value to all colours and
tones.