Dress down days are so cool as you really have less to worry about if you are actually doing a dress down without heels involved, cos I have seen a lot of dress downs with heels involved. It's ok to dress down a denim with heels if your style is diva anytime any day as Divas don't do flats, but I do. I always try different styles, i.e bombshell, diva, sophistication, androgynous, boho and gamine. I have tried it all but I am a huge fan of dress down as it is everyday life of most people. You can be whoever you want without trying too hard to look like someone else as you are not likely to be of same shape. Always dress to be you.
OUTFIT : Shirt - Gap(similar here)/ Jeans- Gap(here)/ Plimsoll - Toms (similar here)/ Necklace- Shourouk (here)(similar here)