Materialesque Thread Design

So I got bored and made a thing. I worked on a minimalistic thread design, similar to Google's Material Theme. Please give critique about things you think I can improve on.
*Warning: This is mainly white.

[spoiler=With Depth][/spoiler]

[spoiler=Without Depth][/spoiler]

Looks really nice !
but it needs some more flat colors

I like the design and concept of it. Looks really clean. The only thing is if you had use a darker color instead it would have been much more cooler.

Elegant, modern and clean.
Noice design.