Plz let me know the reason of hard reject

Envato Authors Theme Authors
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1

http://tiyoshent.in/aliva/ here is my item url. Plz help me to find out the hard reject reason.

2

Hi:
your colors is bad, error w3c is demo, spacing, more your need practice more html for accepted your sell regards.

3

Hi,
I am also working on re-submission and changes in my template.
One thing upon research I found that every themeforest template which I check has no warning and errors when you check on https://validator.w3.org/.
I Found there were warning in in my template which I ignored. and so as your’s too. The second improvement which I will suggest as the design look quite out dated you need to polish it, some good addition of fonts, images and jquery effects will give it a life.