[dimaor]

What trademark exactly? just curious...

what prevents me (legally) to purchase a domain, make it orange, and manually aggregate news in it?

Assuming the content is not scraped, and no icons / logos are copied, can there be legal actions followed and if so on what basis?

[forty]

ycombinator. You cannot have a mark named Teslo which sells electric cars, as customers could mistake one for the other.

[bob88jg]

But ycombinator don't "sell" HN do they? So no infringement...no customers...

[djbusby]

Selling isn't required to make infringement.

[forty]

Yeah, imagine for example if your website displays offensive or illegal content, and people think it's published by ycombinator, it could damage their brand

[the-dude]

I recall the color green being trademarked by the Dutch Telecom ( KPN ), only in combination with telecom though.

Domain typosquat + brand color/style imitation : IANAL, but it sounds clear cut to me.