<static> blendSoftLight(a, b) → {integer}
Darkens or lightens 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 dodged;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 burned in.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 uncha