Thanks a lot for your feedback,
Point 3: This can be change with little dark something value like #777 or something around. I didn't use any color and only grey to keep it more clean and not so bright. I can try if you can suggests any color value.
I have designed without referring any website and put some idea and mixture of few websites what I have designed. Only answer color system (not color) I refereed from stackoverflow, but now I see what you all people have mentioned and I agree after seeing that things looking little similar to other scripts. But than I found most of the script has same type of layout and color. So let me try to find some unique color and layout if possible. Please suggest me if you have any idea but not bright or so colorful, that's what I prefer.