Our kitchen is as above -- all the light which comes in is reflected from grass and trees, and I think this is creating a greenish effect. We tried to paint it a very pale buttery yellow, but the light has turned it a bit dingy and acidic all at once so we're going to do it all again. Are there any easy tips on how to deal with greenish light? We did do testers before on multiple walls, but this issue only really becomes apparent with a big area, I think.