Recently, my friend asked me how to put together a denim on denim outfit. I know putting two of the same fabrics are hard because if you mess it up, you can mess up pretty badly!
Here is the advice I gave him:
1: Make sure to use two different colored denims.
2: Add colorful accessories or a pop of color under the denim jacket/shirt (this could be just a plain white or colored shirt: vibrant colors are recommended).
3: Make sure that the outfit fits.
While using two different colored denims is not necessary the must, it is way easier to get right (using the same color has a lot higher risk of messing up your style).
Also, the second point is totally just my style but I like putting different materials and colored accessories when I wear denim on denim just to bring more colors to my outfit. (As you can see, I'm wearing a leather bracelet, silver watch, a colorful scarf, clear and white bracelet, and a random ribbon that came with my bag. lol)
Lastly, make sure your outfit fits you well. Nothing like an unintentionally oversized jacket to ruin your style.
Anyways, I hope this helps for people who are thinking about trying denim on denim. :)
Have a fantastic day!