Dark brown might seem an unlikely bedroom colour, but its warm and smoky cocoon-like qualities make it a great choice for creating a dark cosy space.
Try smoky browns such as Resene Monkey or Resene Mondo, creamy browns such as Resene Milk Chocolate or try a wood stain such as Resene Colorwood Deep Oak or Resene Colorwood English Walnut. A cheap DIY hack is to stain pieces of ply and attach them directly to the wall. The wood stain will allow the grain of the ply to show through and deep brown shades will evoke a Victorian style parlour.

