Gartside, Mary: An Essay on Light and Shade, on Colours, and on Composition in General (London, 1805)

27

has warmth enough to fit it for a prominent situation in the mass of warm
colours, or as a principle one by itself, but may be introduced in less
conspicuous places.

The following shews the Prismatic order, and proportion of Colours.

Red

-

-,

45 degrees.

Orange -

-

-

27

Yellow -

-

-

48

Green -



.-

60

Blue -

- •

. -

60

Indigo -

-

-

40

Violet -





80

The following shexvs the order they stand in, in point of illumination, as proved
from the before-mentioned experiments.

The highest degree of illumination lies between

Bright Yellow, and

Pale Green;
next Orange,
then Red,

and Blue equally with Red;
then Green,

Indigo,

Violet.

The result of the foregoing is, that though the prismatic order of co-
lours must, in some degree, guide their arrangement in a group, this order

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