In granites, most potassium feldspar comes in two slightly different forms, Orthoclase feldspar and Microcline feldspar. In the granite image you started with, it's microcline (but you can't tell that from a picture). Granites from central Texas generally have microcline and not orthoclase as their potassium feldspar.

K-spar is typically pink to red or white. K-spar color is generally the principal influence on the color of granite.

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