A bed is where your colonist can get some sleep. When first placed a bed will be grey until you assign that bed to a specific colonist for use. The style of the bedsheets will help determine who the bed belongs to. For very slow walking characters, such as Mr Zhang who requires a lot of sleep, it would be prudent to have his bed very close to his workstation. Beds should, however, be kept away from noisy objects, such as the disco, as a sleeping colonist will be woken up.