A dark background block is a type of non-solid background block which enshrouds the tile it is placed on in darkness.
Light source blocks may provide light to neighboring tiles when placed. In a similar manner, a player can illuminate their surroundings by equipping certain light source clothes. The Night Vision Goggles disregards darkness completely.
List of Dark Background Blocks
|Dark Cave Background||None.|
|Dark Snowy Cave Background||Has a slight chance to act as a light source instead.|