Hello aspirant,

Strictly, NO. You cannot use cake colors or brush pen in JEE and NATA. Apart from your admit card, passport sized pic and your identification proof, you cannot take anything inside the examination room such as pen, pencil, colors, geometry box, calculator, electronic devices or text/hand written materials.

If you take or use anything else, you will be not allowed to sit for the exam and will exterminate you.

Hope, this information helps you.