AT&T 6300 Programmer's Manual page 209

Syntax
foreground
dummy
Remarks
COLOR
Statement
High and Super-resolution Graphics
Defines the graphics and foreground text
colors.
COLOR [foreground] [, dummy]
is a numeric expression rounded to the nearest integer. It
must be in the range 0 to 15. This specifies both graphics and
text foreground color and defaults to White (color
7).
The
background color is always black.
is ignored in this mode.
When you enter a CIRCLE, DRAW, LINE,
PAINT, PRESET, or PSET statement in your
program, you can specify a color number of 0,
1, 2, or 3. A color of
°
or 2 indicates black. A
color of 1 or 3 selects the color from the current
foreground as defined by the COLOR statement.
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