Denim Shirt

A: Absolutely! Denim-on-denim is a timeless look. The key is creating enough contrast so your outfit looks intentional rather than like a uniform.
If your shirt is lighter or darker than your jeans - or if it's made from a softer, lighter-weight denim - you can simply wear it as you would any other shirt. Mixing different washes, such as a light chambray-style shirt with dark indigo jeans, creates contrast and makes the outfit feel balanced.
The same guidelines apply when pairing a denim shirt with skirts. If your skirt is made from denim that's similar in color and weight, add a contrasting camisole, turtleneck or T-shirt underneath and wear the shirt open, or accessorize with a belt or jewelry to break up the look. If the skirt is a different wash or fabric weight, you can wear the shirt buttoned up and treat it just like a light blue blouse.

Because denim acts almost like a neutral, it's easy to dress up or down depending on your shoes and accessories. With a few styling tweaks, a denim shirt can quickly become one of the best pieces in your wardrobe.
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See also:
Choosing outfit colors
How to wear buttoned blouses
Same jeans, different looks