Numerous works have been published and numerous methods of instruction adopted; but they are almost all directed to points of mechanical execution, or the representation of individual objects, which mainly depend upon skill.
Skill is the natural result of practice or fortunate organization, and will, of course, differ with the perseverance or capacity of the student, which has led to the persuasion that the productions of Art are dependent upon what is called natural genius.
But what is known of Art may be as easily communicated as any other fact, and as easily acquired as a knowledge of history, or any other appeal to the memory, and is indispensable equally to the critic and to the amateur. On this subject there are few if any works; and it is rarely touched by professed teachers of the Art.
The method of private tuition at present in favour is, to make a drawing before the pupil, who is expected to appreciate the course of proceeding, and to imitate the effect.
Watching a drawing thus in progress, it will be observed that the greater part is done apparently without a thought; it appears to be literally at the "fingers' ends" of the artist: and this will be found to comprehend much, it not all that confers the effect of a picture. But in what does this consist? Repeated practice, and continued study of works of art, will undoubtedly, in time, bring it to the "fingers' ends" of the student also, and it will insensibly become an inexplicable habit, manner or style. But this is, in fact, what may be taught or communicated in a short time; it is the knowledge resulting from the experience of ages,—the edifice built up of discoveries from time to time contributed to the fund of Art by the success and failures of our predecessors. This is the knowledge or science of painting, which should precede all practice or attainment of skill, and such portion as relates to colouring, it is the intention of the present work to supply. Skill will follow as a result of the endeavour to make use of the means to produce the end—Pictures.
There has been, unfortunately, so great confusion in the use of the terms applicable to Colours, that it becomes difficult to convey any distinct information respecting them, without hazarding the charge of pedantry by limiting the signification of certain words. Tints, Tones, and Shades of Colour have been, and still are, too commonly used so indiscriminately to mean the same and different things, that no definite impression can be given, unless there exist a previous knowledge of the mode in which each word is applied. It will, therefore, be necessary to explain the meanings with which each word will be used in the present work.
Tints are those specific and definite qualities of colours, by which the individuals of a class are distinguished from each other: as of Reds; Scarlet, Crimson, Pink, Rose-colour, &c.: of Greens; Apple-green, Olive-green, Pea-green, &c.: of Yellows; Straw-colour, Amber, &c.: of Blues; Sky-blue, Garter-blue, Indigo, &c.
Shades of Colour imply the degree of brilliancy or depth, as bright or deep Crimson; light or dark Blue.
Tones of Colour are of more general application, as indicating the general aspect of classes of Tints or Shades; and especially designating the degree of warmth or coldness: as cool greens, warm greys. There may be lighter and darker Shades of the same Tone, but not of the same TINT. Rose-colour and Crimson may be said to be lighter and darker shades of the same Tone.
The word Tone is also used by itself in opposition to crudity or rawness of colour; and hence is technically descriptive of the ternary compounds, of whatever tint or shade; while the primary colours and the binary compounds, Blue, Red and Yellow, and Purple, Orange and Green, are technically distinguished as Colour. The lighter shades of Tone in this sense are technically included under the term Greys; warm, as they contain Orange; cool, as they contain Purple or Green. Tints and Tones are further classed as pure, as they approach purple, and those tints observed in Mother of Pearl, hence, also pearly tints; warm or hot as they approach Orange; heavy, and unless they are exceedingly transparent, muddy, as they approach Green.