suffusion

The act or operation of suffusing or overspreading, as with a fluid or a color; also, the state of being suffused or overspread.

That which is suffused or spread over, as an extravasation of blood.

In entomology, a peculiar variegation, observed especially in Lepidoptera, in which the colors appear to be blended or run together.

The act or process of suffusing, or state of being suffused; an overspreading.

That with which a thing is suffused.