I have just bought [[http://www.zara.com/webapp/wcs/stores/servlet/product/uk/en/zara-W2012/269185/894530/STRAIGHT%20LACE%20DRESS this]] for an occasion where I will need to wear tights and heels. Can anyone suggest what colour tights and shoes I should wear? The dress is navy and the underlay beneath the lace is black. Thanks