/**
* Converts a colour from #rrggbb to Java Color object.
*
* @param rgb String e.g. #ff00ee
* @return Colour
* @throws IllegalArgumentException If colour string is not valid
*/
protected Color convertRgb(String rgb) throws IllegalArgumentException {
// Get colour parameter
Matcher m = REGEX_RGB.matcher(rgb);
if (!m.matches()) {
throw new IllegalArgumentException(
"MathML invalid colour '" + rgb + "'; expected #rrggbb (lower-case)");
}
return new Color(
Integer.parseInt(m.group(1), 16),
Integer.parseInt(m.group(2), 16),
Integer.parseInt(m.group(3), 16));
}
