Check out colors that have a "tangerine" kind of base. That is, colors that are very warm, golden orange-ish. since Fir is so warm and golden, they will mesh really well. and those kind of colors are both "modern" and historic for a 100 year old house. avoid the temptation to contrast the warmth of your newly cleaned wood with a cool or dull color - it will totally kill that beautiful glow that old wood has.

Now, Choosing yellow-based colors shouldnt eliminate blues or purples. Those can be very warm, too (think peacock blue or wine-like purples). and finally, there is a green that I call orange-green. its lovely. It may be referred to as olive, too, but most olives are too grey. this orange-green is unusual since when you see it, and look at it for a while, you can easily see the orange hue beneeth the green. Ill find a paint sample that is similar and post it here for you.