\color_back

Description 

Operator to specify the desired color of the backside of the sheet of paper. This color is used within a fill operation (operator \fill see §) in which the side flag is equal to 'back'. There are two different ways to define a color:

• by its name (according to those predefined),
• by its RGB values.

Therefore, two syntaxes are provided. The first one takes only one parameter which is the color symbol name. This name should be one of those declared by the language (see below). The second syntax takes three integer values which are respectively red, green and blue percentage.
Due to its global aspect this operator should only appear in a diagram header block.

Usage

  \color_back(gray80);
  \color_back(0, 0, 100); % cyan

Formal structure

  \color_back(COLOR);
  \color_back(RED, GREEN, BLUE);

Parameters

  COLOR
  Description    : Indicates the name of the back color. 
  Type           : Symbol.
  Allowed values : One of the predefined color name :
                   [black, gray10, gray20, gray30,
                    gray40, gray50, gray60, gray70,
                    gray80, gray90, white].

  RED
  Description    : Indicates the percentage of red in back color.
  Type           : Integer.
  Allowed values : Any integer in range [0, 100].

  GREEN
  Description    : Indicates the percentage of green in back color.
  Type           : Integer.
  Allowed values : Any integer in range [0, 100].

  BLUE
  Description    : Indicates the percentage of blue in back color.
  Type           : Integer.
  Allowed values : Any integer in range [0, 100].