The light from the south, southeast, and southwest supplies plenty of yellow. It is, then, necessary to add the remaining primaries or at least one of them in the form of gray-blue, orange, or orange-yellow, reduced to one-fourth chroma and practically to neutrality or grayish-reds and greens, well reduced in chroma. Any hue strongly yellow should be avoided.
[Sidenote: Effects of Hue upon Apparent Size]
Certain hues materially affect the apparent size of a room. If the room is small certain values and hues will make it appear much smaller. Dark values, as a rule, make the room look smaller by seemingly drawing the walls closer together. Red contracts the apparent size of a room, while yellow and blue expand it. Green and shades of yellow and red-orange, if not too dark, have little effect upon the apparent size of a room.
(_a_) Determine, by its exposure, the kind of light the room receives.
(_b_) Choose a hue for the walls embodying one or both of the primary hues not represented by this daylight.
(_c_) Select a value and chroma for this hue in accordance with Rules 12b and 12i.
(_d_) Select a hue, value, and chroma for the ceiling in accordance with Rules 12g, 12e, and 12j.
(_e_) Select the correct hue, value, and chroma for paint or stain for the wood work in accordance with Rules 12f, 12a, and 12h.
Develop the color scheme for the walls, ceiling, and wood work of a room with a northern exposure; southern exposure. Mix the stain for a piece of oak to harmonize with the wood work and walls of the living room of your home.
Determine the wall tints to harmonize with dark weathered oak. Mix them from dry colors.
Rule 12a. _An average wood stain is to be retained between the values middle and low dark._
Rule 12b. _An average wall hue is to be retained between the values light and middle._
Rule 12c. _An average ceiling hue is to be retained between the values white (minus) and light._
Rule 12d. _The relation between the side walls and furniture, trim, etc., should be retained within the range of four values or less, as low light and dark._
Rule 12e. _The relation between the side walls and ceiling should be within the range of three values or less, as high light and low light._