Oak trees can have spectacular fall foliage, though the exact color depends on the type of oak that you are looking at. Some oak trees are even evergreen, so they don't change color in the fall at all.
The most common color for oak tree foliage is yellow. They turn a bright, crisp golden color, perfect for collecting, drying, and keeping. Some oak trees turn dull yellow, and these can provide an amazing contrast to the brighter ones, no matter how you choose to preserve them.
A few oak trees, like the Pin Oak and the Northern Red Oak, display a breathtaking red color every autumn. These trees stand out from the crowd, both because they turn red instead of yellow or orange, but also because the red is richer and deeper than that of many other trees. If you can find these leaves, they are definitely worth keeping, as much of the color can be saved when you dry them or preserve them in other ways.
Other oak trees turn brown in the fall, without going through yellow or red first. You might think that these leaves aren't worth keeping, but you'd be wrong. Oak leaves actually turn all shades of tan, brown, bronze, and reddish-brown. While these leaves may not be as bright or enticing as the yellow and red ones, their color is often rich and deep, making them worthy of your excitement in their own right.
Oak leaves are worth examining and collecting for their color alone, but their shape is also unique and worthy of your notice. These leaves have much deeper indentations than most, almost breaking the leaf into five or seven lobes. This makes the leaf look thin, though when you examine it you will find that it is actually about the same width as the other leaves you might encounter.
Fall is one of the best seasons to get to know the oak tree. The colors and the unique leaf shape make its foliage worth seeing, appreciating, and collecting.