Plurk paste

When shown the alternating stripes of red and green, the border between the stripes faded and the colors flowed into each other — an as-yet-unexplained visual process known as "perceptual filling in," or "image fading." But when asked to pick out the filled-in color on a color map, study participants had no trouble zeroing in on muddy brown. "The results show that their perceived color during color mixing is just an intermediate color," Hsieh wrote in an email.