docs: @Pure
  	@SuppressWarnings("checkstyle:magicnumber")
  	public static String toColor(int rgba) {
  		final String code = ColorNames.getColorNameFromValue(rgba);
  		if (!Strings.isNullOrEmpty(code)) {
  			return code;
  		}
  		final StringBuilder s = new StringBuilder("#"); //$NON-NLS-1$
  		s.append(Integer.toHexString(rgba));
  		while (s.length() < 7) {
  			s.insert(1, '0');
  		}
  		return s.toString();
  	}