9 
the other, which would be the case, were it not for the intermediate 
tints, Green, Orange, and Violet. 
This explains the nature of the harmonizing tints; and I shall 
endeavour to explain the contrasting tints, as both are made 
the subjects of the following blots, and though particularly 
specified in each, yet they may perhaps be better understood by 
this explanation. 
By the contrasting tint, is meant one which is the most 
opposite in its nature from that to which you wish to oppose it: thus, 
for instance, Yellow, Blue, and Red, as has already been shown, 
are essentially different, from each other, but not so much so as 
for any one of them to form the greatest contrast to the other; 
a still greater may be produced to Yellow: for instance, by the 
two together, Blue and Red, which form Purple or Violet. In this 
colour, the opposition is double ; and when there is an equal quantity 
of both these colours in the mixture, the strongest contrast to Yellow 
is produced. Thus the intermediate tints, Violet, Green, and Orange, 
form the strongest contrast to \ ellow, Red, and Blue. This may 
be rendered more clear, by inspecting the following diagram, 
where the three primitive colours being placed at the three 
