protected Paint getBorderColor( Component c ) {
		return isEnabled( c )
			? (isFocused( c ) ? focusedBorderColor : borderColor)
			: disabledBorderColor;
	}
Returns the outline color of the component border specified in client property
{@link FlatClientProperties#OUTLINE}.
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatBorder.java