Do Black Light Posters work framed in glass?

They still glow but the effect is diminished.

Try a soft buttery yellow (unless your room has north-facing windows, in which case, avoid yellows), or a light green (think plant green, not sea green). Apricot or peach are also options. If you use a blue wall colour, your room could become overwhelmingly blue - and while white has its place, from what you've described, I suspect that white will give your room a slightly industrial quality - not really what you're looking for! To coordinate your living and dining room, think texture instead of colour - use the same colour in both spaces with different textures (don't be intimidated, there are plenty of easy paint finishes out there that look great. . .your local paint shop can provide you with instructions). Alternatively, find a colour you like in your living room and use a related shade in your dining room (as a rule of thumb, go lighter in your living space and darker in your dining room). Finally, before you commit to a colour, get a sample can from your paint store, go home and paint a spot on the wall (about eighteen inches square) in a nice, visible spot. Live with the spot for a few days and see how it looks (remember to prime under and around it, if you currently have a dark or very different colour). If you don't love it now, you never will (and you'll have to pick a new colour) but at least you won't have to repaint the whole room! And don't panic if you don't get the first one right - even the pros make mistakes (and they spend years learning to visualise colour).