The BACKGROUND-COLOR Clause

General Rules

1. This clause is available for use only with a color screen.
2. Integer-1 or identifier-1 specifies the background color of the screen item. The colors and their corresponding values are:

   0	black	8	grey
   1	blue	9	light blue
   2	green	10	light green
   3	cyan	11	light cyan
   4	red	12	light red
   5	magenta	13	light magenta
   6	brown or yellow	14	yellow
   7	white	15	high intensity white

   On a color screen, if the value is from 8 to 15, this is equivalent to specifying an integer from 0 to 7 and specifying the BLINK clause. On a monochrome screen, this is equivalent to simply specifying the BLINK clause.

3. If this clause is not specified, the background color defaults to black.
4. If a screen description contains a BLANK SCREEN clause, and either contains a BACKGROUND-COLOR clause or is subordinate to one that does, when the screen item is displayed by a DISPLAY statement the specified color becomes the default background color. It remains the default background color until either another screen item with this combination of options is displayed (whether in the same DISPLAY statement or another), or a Format 3 DISPLAY statement with both options is executed.
5. Identifier-1 must be an unsigned numeric integer and should contain a value between 0 and 7. Any value higher than 7 is divided by 8 and the remainder used as the color value.
6. Identifier-1 must not be subject to OCCURS clauses.
7. Whether a value of 6 in integer-1 or identifier-1 produces brown or yellow color depends on the terminal hardware.