Modified ouf_mono

  local PostUpdateHealth = function(s, unit)
    local r, g, b, t
    if(UnitIsPlayer(unit)) then
      local _, class = UnitClass(unit)
      t = oUF.colors.class[class]
    else
      r, g, b = .2, .9, .1
    end
    if(t) then
      r, g, b = t[1], t[2], t[3]
    end
    if(b) then
      local bg = s.bg
      if UnitIsDeadOrGhost(unit) or not UnitIsConnected(unit) then
        bg:SetVertexColor(r/3, g/3, b/3, 0.8)
      else
        bg:SetVertexColor(0, 0, 0, .8)
      end
      s:SetStatusBarColor(r, g, b, 1)
    end
  end