* @param ANSIColor   a named ansi color
	 * @param XTERMColor  a named xterm256 color
	 */
	private void setDisplayColor(final String displayType, final String ANSIColor, final String XTERMColor) {
		if (this.displayColors.containsKey(displayType)) {
			final Pair<String> colors = this.displayColors.get(displayType);

			if (ANSIColor == null)       this.displayColors.put(displayType, new Pair<String>(colors.one, XTERMColor));
			else if (XTERMColor == null) this.displayColors.put(displayType, new Pair<String>(ANSIColor, colors.two));
			else                         this.displayColors.put(displayType, new Pair<String>(ANSIColor, XTERMColor));
		}
		else this.displayColors.put(displayType, new Pair<String>(ANSIColor, XTERMColor));
	}