Both Iron Ore and Peppercorn fall under the category of gray paint colors that are fairly neutral in undertone. The main difference is simply that Peppercorn is lighter! Both Sherwin Williams paint colors are great exterior color choices! See my color review here: https://dailysplendor.com/sherwin-williams-iron-ore-sw-7069-my-color-review/ sherwinwilliams ironore peppercorn exteriorpaint darkgraypaint LTKHome