抽象主義
abstract
art
asymmetric
background
black
blackwhite
bw
center
centric
circle
circular
colorless
concentric
effect
element
geometric
graphic
grayscale
greyscale
gyration
gyre
illustration
irregular
minimal
misc
miscellaneous
modern
monochrome
monocrome
op
opart
optical
radial
radiating
random
rings
ripple
rotating
rotation
round
spiral
swirl
twirl
uncolored
visual
vortex
white