Everybody who has done their own DIY paint job knows that the paint you choose is going to look different once it's dry. That's just how paint works. You get a dark purple, it will probably dry lighter. You get a pale yellow, it will probably dry brighter, etc. Plus, the paint looks different in the sunlight, so if you have a sunny room, that's important to know. So always keep that in mind when you're picking your paint. Of course, there are DIYers who go into their projects not doing any rese…