Latitude 7430

You should put this information in your title post. For the record that is not what single color means but I get what you're saying. Just state that you want a black windows laptop with a centered trackpad for <$400. Dell latitudes and lenovo thinkpads come in black. Unsure about HP. Something like

I know this is a little over budget. But it's a nice 14" Latitude https://www.dellrefurbished.com/item/dell-latitude-7430-touch-000015/dell-latitude-7430-touch/1.html

Nah, it's just a bad design thing. I have a Dell Latitude 7430 and it's never woken up with the lid closed. I don't even need to close the lid, 'cause if it doesn't detect me in front of laptop, it just goes to sleep on its own.