are there any feng shui rules about putting paintings over or opposite your bed?

you should not:

put a mirror opposite your bed.

hang artwork depicting violence (obviously) or people alone.

have a metal bed frame - it conducts energy where you sleep

have tv or computer in your bedroom (or, if you must, they should be covered at night. you can use a screen or blanket)

you should:

position your bed so that you can easily see the entrance to your room

be able to get to the bed from both sides - ie, don’t shove one side of the bed against the wall

paint your room in calming colors, nothing bright like red, orange, bright yellow or pink
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paintings - no. fengshui is not about decorating or painting the room a certain color. it’s not about lighting or setting the mood. it’s not about common sense in arranging furnitures. it is much more than that. fengshui consists of many concepts, which are used to know what areas in your house have good energy and what areas have bad energy - so you can use these areas to enhance your life by living most of your life/ time in the good energy areas, and leaving the bad energy areas to the toilet, garage and hallways. you build a house based on fengshui; and adjusting a house to ammodate fengshui is expensive. if there are books claiming that fengshui is easy and simple. then if it’s too good to be true, then most of the time, they’re not true at all.
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There is no saying of paintings not allowed in Bed room, but I would advise that photoes of individual or family, avoid hanging in bed room. Pictures of fierce animals are also taboos.

Well for the color and theme, go and see a Bazhi consultant, to know what element you need, then apply it accordingly. Example: If you lacks wood then decor your room with green things

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