Lead might have a "favorite thickness" that results in bluishness.

I look at the sky - dark bluishness with sparse stars.

His eyes saw bluishness that rose and disappeared.

It was of a tawny color, with great, irregular areas of yellow and patches of bluishness.

Plus, however, was covered in fur of a shade that almost 'fought' with theirs, having an orange hue whereas theirs had a bluishness to it.

The bluishness of typical lead metal can be thought of as medium-dark colorless metal covered with a thin transparent layer of oxides and/or sulfides.

The image I have is that of a violently angry person, with eyes bulging and a deep reddish color in the face - such a deep color that it suggests bluishness."