How to Style Long Sleeve Denim Shirt Dress for Spring w. Large Braided Belt. Spring Outfit Ideas.Denim is a wrap-faced cotton sturdy textile that has been very popular over the last 150 years, since it first started gaining in popularity in the 19th century, because of it’s the casual and comfortable look and feeling, denim kept the image of one of the most frequent materials in the fashion world. After the classic jeans, denim started producing other lines that ended up being just as successful. One of them is the denim shirt dress. Wear the same dress in different occasions. Denim shirt dress is a way to look casual, feminine and modern at the same time. These dresses are very comfortable to wear during the day, in your office, bar or even the nights out. You can find different designs depending on your own style and needs. Denim shirt dress gives you a chance to experiment with your outfit any way you want. From dressing it up with a pair of high heels or boots to your sneakers, it lets you adapt the dress to any style and still look just as stylish. Denim colors. Except from the classic look and famous blue color, denim shirt dresses can be found in various different colors too. Most of denim products today are dyed with synthetic indigo dye. Denim fabric dyeing has two categories: indigo dyeing that produces the blue color or similar shades and sulfur dyeing that produces special black colors or others, such as red, purple, green, mustard, grey and rust.