PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The effect is much weaker when the contrasting colors are displayed on a white or other light background of low saturation, particularly when the background's hue is different from that of either of the contrasting colors (unless of course the saturation is zero, in which case the hue can be anything at all :).
http://www.w3.org/ns/prov#wasQuotedFrom
  • luminanze.com