Colorama Effect; To Customize A Palette With The Colorama Effect - Adobe AFTER EFFECTS 7.0 Manual

The following controls indicate the particular point on the pivot frame that remains constant throughout the footage.
Place the effect points to select an area for stabilization. If you select multiple points, consider that Color Stabilizer
is most effective when those points vary widely in color and brightness.
Specifies a single point that will remain constant, if you choose to stabilize brightness only. If you choose
Black Point
to stabilize levels or curves, this control specifies a dark point that remains constant.
Specifies a point between two values of color or brightness that will remain constant. This control is
Mid Point
available only if you choose to stabilize curves.
Specifies a light point that will remain constant. This control is available only if you choose to stabilize
White Point
levels or curves.
Specifies the size, in radius of pixels, of the sampled area.
Sample Size

Colorama effect

The Colorama effect assigns a custom palette to an element in a layer and then cycles the palette. First you colorize
an image with a specified palette, and then you cycle the colors in that palette—that is, change them smoothly around
the Output Cycle palette or color wheel. Color cycling is a quick way to animate pulsing colors that follow a gradient
path, colors that zoom out of a radial gradient, and many other effects.
This effect works with 8-bpc and 16-bpc color.
Original (left), and with effect applied (right)
Colorama works by first converting a specified property to grayscale and then remapping the grayscale values to the
specified color palette. The current color palette appears on the Output Cycle color wheel.
The grayscale is then wrapped around the color wheel. Black pixels are mapped to the color at the top of the cycle,
while increasingly lighter grays are mapped to successive colors going clockwise around the cycle, until this process
wraps around to the start again at full white. For example, with the default Hue Cycle palette, pixels corresponding
to black become red, while pixels that have been converted to 50% gray become cyan. You can animate the cycle so
that in one revolution, each pixel of the layer travels through the complete color cycle.

To customize a palette with the Colorama effect

You can customize any palette by altering the colors and locations of the triangles around the Output Cycle control
of the Colorama effect.
•
To change a triangle's location on the color wheel, drag the triangle. Shift-drag to snap the triangle to 45-degree
increments.
•
To add a triangle, click in or near the color wheel, and select a color from the color picker.
•
To duplicate a triangle, Ctrl-drag (Windows) or Command-drag (Mac OS) the triangle to the new position.
•
To delete a triangle, drag it away from the color wheel.
•
To change the opacity, select a triangle on the color wheel and then drag the attached triangle above the opacity
slider. Make sure that Modify Alpha is selected if you want the opacity information to affect your output.
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User Guide