Hello Aspirant,

See there is no restriction on the color of your dress but light color is much preferred as it is comfortable for candidate as well as the team of NTA to check for the prohibited materials but if you wear dark colour jeans then also you will be allowed to give the paper so yes you can definitely wear the dark colour jeans for JEE-Main 2021.

JEE-Main 2021 April session(session 3) is being conducted from July 20th-27th and NTA has issued the guidelines along with the JEE-Main 2021 Admit card for Exam day for the candidates and those all guidelines are described below :-

The candidate should carry the following things :-

• Admit Card
• One original valid photo identity proof issued by the government that can either be PAN card/Driving License/Voter ID/Passport/Aadhaar card with photograph,E-Aadhar/Ration Card/Aadhaar enrollment number with photo.
• One passport size photograph (same as uploaded in the online application form of JEE Main 2021). This photograph will be required by the invigilator to paste it on the attendance sheet at the centre.
• Duly filled in self declaration form (Undertaking) downloaded from the NTA Website.
• Personal hand sanitizer (50 ml) also it will be provided at the examiantion center as well.
• Personal transparent water bottle.
• Mask and gloves.
• For drawing test (B.Arch paper part 3) - candidates have to bring their own geometry box, pencils, erasers, colour pencils/ crayons.
• If you are diabetic then authorities have allowed carrying eatables like sugar tablets/fruits (like banana/apple/ orange) and transparent water bottle. But note that no candidate is allowed to carry packed foods like chocolate/candy/sandwich into the examination hall.

Items which are prohibited at exam centre are also enlisted below :-

Pen/Pencil, electronic devices such as mobile phones, calculators, slide rules, log tables, printed or written material, bits of papers, pager, or any other device.

For more details kindly check out the link given below :-

https://engineering.careers360.com/articles/jee-main-exam-day-guidelines

I hope this information helps you.

Good Luck!!