As in topic. I also would like to get some feedback if it's possible. Thanks a lot for help. http://hackleaders.com/
Try to give a bit more color to your header and add some texture to your background. To much black/grey + white.
Your website isn't bad , but honestly you need to give it more colors to make it looks attractive . Listen to what @quiz said , White + grey in combination with blue will be perfect choice
I think the site looks good as far as overall structure. Yes, the header could stand out a little more. Also, I would suggest some sort of description or info what its about. I was a bit confused when I visited at first. Good luck!