On the Layers toolbar, click the Layer Properties Manager
button.
In the Layer Properties Manager, click the color you want to
change.
In the Select Color dialog box, use one of the following
methods:
On the Index tab, click a color and then click OK.
On the Index tab, enter the ACI color number (1-255) or name in
the Color box, and then click OK.
On the True Color tab, select the HSL color model in the Color
Model option and specify a color by entering a color value in the
Color box or by specifying values in the Hue, Saturation, and
Luminance boxes, and then click OK.
On the Color Books tab, select a color book from the Color Book
box, select a color by navigating the color book (using the up and
down arrows) and clicking on a color chip, and then click OK.