Birch Hardwood Flooring:

The sapwood of yellow birch ranges from pale white to creamy yellow, while the heartwood tends to be a light-reddish brown with a red tinge.  Birch wood has an even texture with a straight, closed grain. Occasionally, boards may show curliness and waves in the grain. It's simple, and makes for
attractive flooring. Birch hardwood flooring has only a small degree of lustre.