Bokeh

Bokeh: derived from Japanese bokeaji ボケ味, "blur" is a photographic term referring to the appearance of out-of-focus areas in an image produced by a camera lens using a shallow depth of field. Different lens bokeh produces different aesthetic qualities in out-of-focus backgrounds, which are often used to reduce distractions and emphasize the primary subject. (wikipedia)

So a kind of pleasing out-of-focus.