These findings suggest that color makes information more memorable, but only
if the colors are realistic. They also suggest that when the
brain takes in visual information, conceptual knowledge (i.e.,
"grass is normally green") and color and are processed
together. The result may be a stronger memory for that information.
If these effects of color on memory withstand further testing,
industries such as advertising could take advantage. To grab
a potential customer's attention, any kind of bright coloring
may be sufficient. But to make an image really "stick"
in memory, using the natural coloring of an object may be
a better strategy.
"The contribution of color to recognition memory
for natural scenes," by Felix A. Wichman, et al.
(Journal of Experimental Psychology: Learning, Memory, and Cognition,
May 2002, Volume 28, Number 3, pp. 509-520.)