Color.blendHardLight()

Multiplies or screens the colors, depending on the source color value.

If the source color is lighter than 0.5, the backdrop is lightened, as if it were screened;
this is useful for adding highlights to a scene.

If the source color is darker than 0.5, the backdrop is darkened, as if it were multiplied;
this is useful for adding shadows to a scene.

The degree of lightening or darkening is proportional to the difference between the source color and 0.5;
if it is equal to 0.5, the backdrop is unchanged.

Painting with pure black or white produces pure black or white. The effect is similar to shining a harsh spotlight on the backdrop.