Here's why:

* Composition: Basaltic magma is rich in magnesium and iron, which give it a darker color.

* Minerals: The minerals that crystallize from basaltic magma, such as pyroxene and olivine, are also dark in color.

Examples of dark-colored igneous rocks formed from basaltic magma include:

* Basalt: A fine-grained, dark-colored rock that is very common.

* Gabbro: A coarse-grained, dark-colored rock that is often found in the Earth's crust.

In contrast, felsic magma, which is rich in silica, forms light-colored igneous rocks like granite and rhyolite.