Quotation

Of Colouring
{Colouring. what ?} Corruption composition or mixing of Colours, we call Painting ; which is, to express shadows in Colours ; thereby, to resemble, what we do desire to imitate, by a moderate confusion, or tempering, discordant Colours ; as white, black, red, blew, green, &c.
[…].
{With Light and shadows.} Observe herein Light and Shadows, Obscurity and Brightnesse.
Contrary things are more apparant, being placed neer their Contraries ; Light and Shadows forward, set out any Painting outwards ; as if you might take hold of any part.
Obscurity or Darknesse, is the duskishness of a deeper shadow ; as brightness is the Intension of Light.
White appears sooner, or neerer to the Eye ; and the black seems farther off, any thing that should seem hollow (as in a Well, or Cave,) must be coloured blackish ; more deep, more black.
On the contrary, to lighten or rise forward, with white.
{Tonus, what?} Tonus or brightnesse ; as it is of necessary use, so of excellent ornament in a Picture, it is which is above light ; {A Brightness.} sparkling as in the glory of Angels, twinckling of precious stones ; […] : the variety of these Ornaments, must be expressed excellently ; but avoid satiety, not cloy your Picture with it.
{Harmogia what ?} Harmoge in Colours, is an unperceivable way of Arts ; stealing to pass from one Colour to another, as in the sea and skie meeting in one thin mistly Horizontall stroake, both are lost and confounded in sight ; […].

Conceptual field(s)