* Black or Dark Grey: Common in rocks like basalt and gabbro, which are rich in dark minerals like pyroxene and olivine.
* Light Grey or White: Found in rocks like granite and rhyolite, which contain high amounts of light-colored minerals like quartz and feldspar.
* Red or Pink: Can occur in rocks like granite or rhyolite due to the presence of iron oxides.
* Green: Can be seen in rocks like peridotite, which are rich in the green mineral olivine.
So, there's no single color for "igneous". It's a diverse rock type with a wide range of colors!