maybe I'm stupid and missed some obvious clue but I have no idea what the color combo to open the mini fridge is, if there is an obvious clue I missed please let me know 

W=Green

M=Orange

F= Indigo/Dark Blue

I have no idea where to find this combo... Walls, mattress, ...flaaaa? Looks like it's in the RoyGBiv order. ...Possibly the "dream" you get when you fill the bed up with water. And that you can repeat by clicking the bed after.