Eclectic Perambulations in the Noosphere
Copyright Akiyoshi Kitaoka 2011
"Convex-concave reversible image"
Purple squares appear to be convex toward observers for one time, while yellowish-green squares do so for the other time.
The “blue’ and “green” {#00FF96}{0.255.150} are actually the same. The way we perceive colors is affected by the surrounding colors. If you pull out the other colors and leave only the blue/green {#00FF96}{0.255.150}, you’ll see what we mean.