The Grammar of Ornament by Owen Jones, published in London, 1856, pp. 5-8:
Proposition 1

The Decorative Arts arise from, and should properly be attendant upon, Architecture.

Proposition 2

Architecture is the material expression of the wants, the faculties, and the sentiments, of the age in which it is created.

Proposition 3

As Architecture, so all works of the Decorative Arts, should possess fitness, proportion, harmony, the result of all which is repose.

Proposition 4

True beauty results from that repose which the mind feels when the eye, the intellect, and the affections are satisfied from the absence of any want.

Proposition 5

Construction should be decorated. Decoration should never be purposely constructed.

"That which is beautiful is true; that which is true must be beautiful."

Proposition 6

Beauty of form is produced by lines growing out one from the other in gradual undulations: there are no excrescencies; nothing could be removed and leave the design equally good or better.

Proposition 7

The general forms being first cared for, those should be subdivided and ornamented by general lines; the interstices may then be filled in with ornament, which may again be subdivided and riched for closer inspection.

Proposition 8

All ornament should be based upon a geometrical construction

Proposition 9

As in every perfect work of Architecture a true proportion will be found to reign between all the members which compose it, so throughout the Decorative Arts every assemblage of forms should be arranged on certain definite proportions; the whole and each particular member should be a multiple of some simple unit.

Proposition 10

Harmony of form consists in the proper balancing, and contrast of, the straight, the inclined, and the curved.

Proposition 11

In surface decoration all lines should flow out of a parent stem. Every ornament, however distant, should be traced to its branch and root. Oriental practice.

Proposition 12

All junctions of curved lines with curved or curved lines with straight should be tangential to each other. Natural law. Oriental practice in accordance with it.

Proposition 13

Flowers or other natural objects should not be used as ornaments, but conventional representations founded upon them sufficiently suggestive to convey the intended image to the mind, without destroying the unity of the object they are employed to decorate. Universally obeyed in the best periods of art, equally violated when Art declines.

Proposition 14

Colour is used to assist in the development of form, and to distinguish objects or parts of objects one from another.

Proposition 15

Colour is used to assist light and shade, helping the undulations of form by the proper distribution of the several colours.

Proposition 16

These objects are best attained by the use of the primary colours on small surfaces and in small quantities, balanced and supported by the secondary and tertiary colours on the larger masses.

Proposition 17

The primary colours should be used on the upper portions of objects, the secondary and tertiary on the lower.

Proposition 18 (Field's Chromatic equivalents.)

The primaries of equal intensities will harmonize or neutralize each other, in the proportions of 3 yellow, 5 red, and 8 blue, --integrally as 16.

The secondaries in the proportions of 8 orange, 13 purple, 11 green, -integrally 32.

The tertiaries, citrine (compound of orange and green), 19; russet (orange and purple), 21; olive (green and purple), 24; -integrally as 64.

It follows that, --

Each secondary being a compound of two primaries is neutralized by the remaining primary in the same proportions: thus, 8 orange by 8 blue, 11 of green by five of red, 13 purple by 3 yellow.

Each tertiary being a binary compound of two secondaries, is neutralized by the remaining secondary: as, 24 of olive by 8 of orange, 21 of russet by 11 of green, 19 of citrine by 13 of purple.

Proposition 19

When a full colour is contrasted with another of a lower tone, the volume of the latter must be proportionally increased.

Proposition 20

When a primary tinged with another primary is contrasted with a secondary, the secondary must have a hue of the third primary.

Proposition 21

In using the primary colours on moulded surfaces, we should place blue, which retires, on the concave surfaces; yellow, which advances, on the convex; and red, the intermediate colour, on the undersides; separating the colours by white on the vertical planes.

Proposition 22

The various colours should be so blended that the objects colored, when viewed at a distance, should present a neutralized bloom.

Proposition 23

No composition can ever be perfect in which any one of the three primary colours is wanting, either in its natural state or in combination.

Proposition 24

When two tones of the same colour are juxtaposed, the light colour will appear lighter, and the dark colour darker.

Proposition 25

When two different colours are juxtaposed, they receive a double modification; first, as to there tone (the light colour appearing lighter, and the dark colour appearing darker); secondly, as to their hue, each will become tinged with the complementary colour of the other.

Proposition 26

Colours on white grounds appear darker; on black grounds, lighter.

Proposition 27

Black grounds suffer when opposed to colours which give a luminous complementary.

Proposition 28

Colours should never be allowed to impinge upon each other.

Proposition 29

When ornaments in a colour are on a ground of a contrasting colour, the ornament should be separated from the ground by an edging of lighter colour; as a red flower on a green ground should have an edging of lighter red.

Proposition 30

When ornaments in a colour are on a gold ground, the ornaments should be separated from the ground by an edging of a darker colour.

Proposition 31

Gold ornaments on any coloured ground should be outlined with black.

Proposition 32

Ornaments of any colour may be separated from grounds of any other colour by edgings of white, gold, or black.

Propositions 33

Ornaments in any colour, or in gold, may be used on white or black grounds, without outline or edging.

Proposition 34

In "self-tints," tones, or shades of the same colour, a light tint on a dark ground may be used without outline; but a dark ornament on a light ground requires to be outlines with a still darker tint.

Proposition 35

Imitations, such as the graining of woods, and of the various coloured marbles, allowable only, when the employment of the thing imitated would not have been inconsistent.

Proposition 36

The principles discoverable in the works of the past belong to us; not so the results. It is taking the end for the means.

Proposition 37

No improvement can take place in the Art of the present generation until all classes, Artists, Manufacturers, and the Public, are better educated in Art, and the existence of general principles is more fully recognized.