[Color Matte Setup] dialog box

Colors
Type the number of colors (1 to 4) into the box. Or, you can also enter the number of colors by turning your mouse wheel after clicking the box.
Direction
If you have specified 2 or more colors, specify the direction of graduation by its angle. Either type a value into the box or turn your mouse wheel after clicking the box to set a value.
Clicking a color box opens the [Color Select] dialog box.

Color box
Select a color to use for color matte here.
You can type a value into the box directly to select a color.
Color picker
Allows you to select a color from an image shown on the Timeline monitor.
IRE Warning
If checkmarked, brightness of the color chart and color bar is limited in the range up to 68.0 IRE.
Color chart
Drag the cursor here to adjust the color.
Color bar
Drag the cursor here to adjust the color.