Blender Model Looks Darker on Unity

Hello guys.I am pretty new on this forum so i dont know where to ask this problem.So basically i made hollow cylinder and textured it but model looks darker on unity i dont know how to fix it.Thanks for your help.

Blender one;

https://i.hizliresim.com/V369ZP.png

Unity one;

https://i.hizliresim.com/ROBgyo.png