Though it is not my business to enter into the detail of our art, yet I must take this opportunity of mentioning one of the means of producing that great effect which we observe in the works of the Venetian painters, as I think it is not generally known or observed. It ought, in my opinion, to be indispensably observed, that the masses of light in a picture be always of a warm mellow colour, yellow, red, or a yellowish-white; and that the blue, the grey, or the green colours be kept almost entirely out of these masses, and be used only to support and set off these warm colours; and for this purpose, a small proportion of cold colours will be sufficient.

Let this conduct be reversed; let the light be cold, and the surrounding colours warm, as we often see in the works of the Roman and Florentine painters, and it will be out of the power of art, even in the hands of Rubens or Titian, to make a picture splendid and harmonious.

Le Brun and Carlo Maratti were two painters of great merit, and particularly what may be called academical merit, but were both deficient in this management of colours: the want of observing this rule is one of the causes of that heaviness of effect which is so observable in their works. The principal light in the picture of Le Brun, which I just now mentioned, falls on Statira, who is dressed very injudiciously in a pale blue drapery: it is true, he has heightened this blue with gold, but that is not enough; the whole picture has a heavy air, and by no means answers the expectation raised by the print. Poussin often made a spot of blue drapery, when the general hue of the picture was inclinable to brown or yellow; which shows sufficiently, that harmony of colouring was not a part of the art that had much engaged the attention of that great painter.

The conduct of Titian in the picture of Bacchus and Ariadne has been much celebrated, and justly, for the harmony of colouring. To Ariadne is given (say the critics) a red scarf, to relieve the figure from the sea, which is behind her. It is not for that reason alone, but for another of much greater consequence; for the sake of the general harmony and effect of the picture. The figure of Ariadne is separated from the great group, and is dressed in blue, which, added to the colour of the sea, makes that quantity of cold colour which Titian thought necessary for the support and brilliancy of the great group; which group is composed, with very little exception, entirely of mellow colours. But as the picture in this case would be divided into two distinct parts, one half cold, and the other warm, it was necessary to carry some of the mellow colours of the great group into the cold part of the picture, and a part of the cold into the great group; accordingly Titian gave Ariadne a red scarf, and to one of the Bacchante a little blue drapery.

The light of the picture, as I observed, ought to be of a warm colour; for though white may be used for the principal light, as was the practice of many of the Dutch and Flemish painters, yet it is better to suppose that white illumined by the yellow rays of the setting sun, as was the manner of Titian. The superiority of which manner is never more striking, than when in a collection of pictures we chance to see a portrait of Titian’s hanging by the side of a Flemish picture (even though that should be of the hand of Vandyck), which, however admirable in other respects, becomes cold and grey in the comparison.

The illuminated parts of objects are in nature of a warmer tint than those that are in the shade: what I have recommended therefore is no more, than that the same conduct be observed in the whole, which is acknowledged to be necessary in every individual part. It is presenting to the eye the same effect as that which it has been accustomed to feel, which in this case, as in every other, will always produce beauty; no principle therefore in our art can be more certain, or is derived from a higher source.

What I just now mentioned of the supposed reason why Ariadne has part of her drapery red gives me occasion here to observe, that this favourite quality of giving objects relief, and which De Piles and all the critics have considered as a requisite of the utmost importance, was not one of those objects which much engaged the attention of Titian; painters of an inferior rank have far exceeded him in producing this effect. This was a great object of attention, when art was in its infant state; as it is at present with the vulgar and ignorant, who feel the highest satisfaction in seeing a figure, which, as they say, looks as if they could walk round it. But however low I may rate this pleasure of deception, I should not oppose it, did it not oppose itself to a quality of a much higher kind, by counteracting entirely that fulness of manner which is so difficult to express in words, but which is found in perfection in the best works of Correggio, and, we may add, of Rembrandt. This effect is produced by melting and losing the shadows in a ground still darker than those shadows; whereas that relief is produced by opposing and separating the ground from the figure either by light, or shadow, or colour. This conduct of inlaying, as it may be called, figures on their ground, in order to produce relief, was the practice of the old painters, such as Andrea Mantegna, Pietro Perugino, and Albert Dürer; and to these we may add, the first manner of Lionardo da Vinci, Giorgione, and even Correggio; but these three were among the first who began to correct themselves in dryness of style, by no longer considering relief as a principal object. As those two qualities, relief and fulness of effect, can hardly exist together, it is not very difficult to determine to which we ought to give the preference. An artist is obliged for ever to hold a balance in his hand, by which he must determine the value of different qualities; that, when some fault must be committed, he may choose the least. Those painters who have best understood the art of producing a good effect, have adopted one principle that seems perfectly conformable to reason; that a part may be sacrificed for the good of the whole. Thus, whether the masses consist of light or shadow, it is necessary that they should be compact and of a pleasing shape: to this end, some parts may be made darker and some lighter, and reflections stronger than nature would warrant. Paul Veronese took great liberties of this kind. It is said, that being once asked, why certain figures were painted in shade, as no cause was seen in the picture itself, he turned off the inquiry by answering “una nuevola che passa,” a cloud is passing which has overshadowed them.

But I cannot give a better instance of this practice than a picture which I have of Rubens; it is a representation of a moonlight. Rubens has not only diffused more light over the picture than is in nature, but has bestowed on it those warm glowing colours by which his works are so much distinguished. It is so unlike what any other painters have given us of moonlight, that it might be easily mistaken, if he had not likewise added stars, for a fainter setting sun.—Rubens thought the eye ought to be satisfied in this case, above all other considerations: he might indeed have made it more natural, but it would have been at the expense of what he thought of much greater consequence,—the harmony proceeding from the contrast and variety of colours.

This same picture will furnish us with another instance, where we must depart from nature for a greater advantage. The moon in this picture does not preserve so great a superiority in regard to its lightness over the object which it illumines, as it does in nature; this is likewise an intended deviation, and for the same reason. If Rubens had preserved the same scale of gradation of light between the moon and the objects, which is found in nature, the picture must have consisted of one small spot of light only, and at a little distance from the picture nothing but this spot would have been seen. It may be said, indeed, that this being the case, it is a subject that ought not to be painted: but then, for the same reason, neither armour, nor anything shining, ought ever to be painted; for though pure white is used in order to represent the greatest light of shining objects, it will not in the picture preserve the same superiority over flesh, as it has in nature, without keeping that flesh-colour of a very low tint. Rembrandt, who thought it of more consequence to paint light than the objects that are seen by it, has done this in a picture of Achilles which I have. The head is kept down to a very low tint, in order to preserve this due gradation and distinction between the armour and the face; the consequence of which is, that upon the whole the picture is too black. Surely too much is sacrificed here to this narrow conception of nature: allowing the contrary conduct a fault, yet it must be acknowledged a less fault, than making a picture so dark that it cannot be seen without a peculiar light, and then with difficulty. The merit or demerit of the different conduct of Rubens and Rembrandt in those instances which I have given, is not to be determined by the narrow principles of nature, separated from its effect on the human mind. Reason and common sense tell us, that before, and above all other considerations, it is necessary that the work should be seen, not only without difficulty or inconvenience, but with pleasure and satisfaction; and every obstacle which stands in the way of this pleasure and convenience must be removed.

The tendency of this discourse, with the instances which have been given, is not so much to place the artist above rules, as to teach him their reason; to prevent him from entertaining a narrow confined conception of art; to clear his mind from a perplexed variety of rules and their exceptions, by directing his attention to an intimate acquaintance with the passions and affections of the mind, from which all rules arise, and to which they are all referable. Art effects its purpose by their means; an accurate knowledge therefore of those passions and dispositions of the mind is necessary to him who desires to effect them upon sure and solid principles.