Apple Color 1.5 - Manual (Page 201)

The sides of the cube represent color of 100-percent saturation, while the center diagonal
from the black to white corners represents 0-percent saturation. Darker colors fall closer
to the black corner of the cube, while lighter colors fall closer to the diagonally opposing
white corner of the cube.
The HSL Color Space
The HSL (Hue, Saturation, and Luminance) color space distributes a graph of points within
a two-pointed cone that represents the range of color that can be displayed:
• Absolute black and white lie at two opposing points at the top and bottom of the
shape.
• The primary and secondary colors are distributed around the familiar color wheel, with
100-percent saturation represented by the outer edge of the shape, and 0-percent
saturation represented at the center.
In this way, darker colors lie at the bottom of the interior, while lighter colors lie at the
top. More saturated colors lie closer to the outer sides of the shape, while less saturated
colors fall closer to the center of the interior.
The Y
′
C
B
C
R
Color Space
The Y
′
C
B
C
R
color space is similar to the HSL color space, except that the outer boundary
of saturation is represented with a specifically shaped six-sided construct that shows the
general boundaries of color in broadcast video.
201 Chapter 8 Analyzing Signals Using the Video Scopes