protected Color[] getContentBorderColors(int tabPlacement) { Color SEP_COLORS[] = { ColorHelper.brighter(AcrylLookAndFeel.getControlColorLight(), 20), AcrylLookAndFeel.getControlColorLight(), ColorHelper.brighter(AcrylLookAndFeel.getControlColorDark(), 20), AcrylLookAndFeel.getControlColorDark(), ColorHelper.darker(AcrylLookAndFeel.getControlColorDark(), 20), }; return SEP_COLORS; }