MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE Reference page 842

Integer value String value
4
"screen"
5
"lighten"
6
"darken"
842 ActionScript classes
Illustration Description
Multiplies the complement (inverse) of the
movie clip color by the complement of the
background color, resulting in a bleaching
effect. This setting is commonly used for
highlights or to remove black areas of the
movie clip.
Selects the lighter of the constituent colors
of the movie clip and those of the
background (the ones with the larger
values). This setting is commonly used for
superimposing type.
For example, if the movie clip has a pixel
with an RGB value of 0xFFCC33, and the
background pixel has an RGB value of
0xDDF800, then the resulting RGB value
for the displayed pixel is 0xFFF833
(because 0xFF > 0xDD, 0xCC < 0xF8, and
0x33 > 0x00 = 33).
Selects the darker of the constituent colors
of the movie clip and those of the
background (the ones with the smaller
values). This setting is commonly used for
superimposing type.
For example, if the movie clip has a pixel
with an RGB value of 0xFFCC33, and the
background pixel has an RGB value of
0xDDF800, the resulting RGB value for
the displayed pixel is 0xDDCC00 (because
0xFF > 0xDD, 0xCC < 0xF8, and 0x33 >
0x00 = 33).