When the percentage of a felsic mineral in a rock increases what will the color of the rock become?

As the percentage of felsic minerals in a rock increases, the color of the rock generally becomes lighter. Felsic minerals, such as quartz and feldspar, are typically light-colored or even white. Therefore, a rock with a higher felsic content tends to exhibit pale shades, such as light gray, pink, or white, compared to more mafic rocks, which are darker due to their higher content of iron and magnesium-rich minerals.