code: public String getAccumulatorColor(final String accumulatorName) {
  		if (StringUtils.isEmpty(accumulatorName))
  			throw new IllegalArgumentException("accumulatorName is null");
  		if (accumulatorsColors == null || accumulatorsColors.length == 0)
  			return null;
  
  		for (AccumulatorGraphColor accumulator : accumulatorsColors) {
  			if (accumulatorName.equals(accumulator.getName()))
  				return accumulator.getColor();
  		}
  
  		return null;
  	}
docs: Returns accumulator color by given accumulator name.
  
  @param accumulatorName name of the accumulator
  @return accumulator color or {@code null} if accumulator with given name was not found