A Treatise on Painting/Chapter 245
Chap. CCXLV.—Of Colours.
The light of the fire tinges every thing of a reddish yellow; but this will hardly appear evident, if we do not make the comparison with the daylight. Towards the close of the evening this is easily done; but more certainly after the morning twilight; and the difference will be clearly distinguished in a dark room, when a little glimpse of daylight strikes upon any part of the room, and there still remains a candle burning. Without such a trial the difference is hardly perceivable, particularly in those colours which have most similarity; such as white and yellow, light green and light blue; because the light which strikes the blue, being yellow, will naturally turn it green; as we have said in another place[1], that a mixture of blue and yellow produces green. And if to a green colour you add some yellow, it will make it of a more beautiful green.
- ↑ See chap. ccxlviii.