Searching for Iron Gray Hardie Board houses? Dramatic and moody, Iron Gray is a bold and inspired choice. As enduring as an heirloom cast iron skillet, Iron Gray evokes a strength and permanence. To make your exterior really pop, pair Iron Gray with crisp Arctic White trim. But the James Hardie Iron Gray siding color is equally at home in modern settings as well. An exterior clad entirely in Iron Gray is a cutting-edge statement. From historic to modern and all points in between, Iron Gray is a workhorse. Elegant and commanding, the rich depth of Iron Gray will make your home a sure-fire standout.