Janka Hardness Rating 1820 - Hickory is one of the hardest domestic wood species and is highly popular because of its natural color variation and unusual graining. Coloring for Hickory Hardwood flooring can range from creamy whites to medium browns, with even darker browns in some rustic grades. Like Hickory, but scared it will be too bold? Try it in wider planks- think 5" and wider for a less busy look. The more narrow the strips, the busier it gets with all the unique and interesting graining and variation within the boards.