SetDataColors — Set the colors for plotting data sets
$plot->SetDataColors($data_colors, [$border])
$data_colorsAn array of color values, one for each data set. For other possibilities, see Notes. See Section 3.5, “Colors” for more on color values.
$borderArgument provided for backward compatibility. Use SetDataBorderColors instead.
If an array is used for $data_colors, it
must use zero based sequential integer indexes. This is what the PHP manual
calls 'the usual integer indices (starting from zero, increasing by one)'.
Usually the $data_colors argument is an array of colors,
one for each data set to be plotted. For example:
$plot->SetDataColors(array('red', 'green', 'blue'));
$plot->SetDataType('data-data');
$plot->SetDataValues(array( array('', 1, 4, 10, 5),
array('', 2, 6, 20, 3)));
This will plot a red line from (1,4) to (2,6), a green line from (1,10) to (2,20), and a blue line from (1,5) to (2,3).
If $data_colors is not an array, but a single color
value, then that color will be used for all data sets.
However, the array(r,g,b) notation is not allowed in
this case (because it looks like an array of 3 separate color values).
If $data_colors is an empty string,
the following 4 colors are used: blue red green orange.
If SetDataColors is never called, the default colors in order are: SkyBlue, green, orange, blue, orange, red, violet, and azure1. Note that for some reason orange appears twice. If you are plotting more than 4 data sets, you should call SetDataColors to set distinctive colors.