Summary .— The sensation of being dazzled by light was investigated, and the eff ects
of colors on the feeling were assessed using stimuli composed of a disk and a surrounding
annulus with luminance gradient, which had a glowing appearance. The colors of
the disk and annulus were varied, while the luminance of each pixel was unchanged.
In addition, disk and maximum annulus luminances were also varied. Ten participants
were asked to rate the feeling of being dazzled for the stimuli. Results of a four-way
analysis of variance (ANOVA) indicated that the main eff ect of disk color was not signifi
cant, whereas the annulus color was. Furthermore, there was signifi cant interaction
of the disk color and the annulus color. On the whole, the feeling of being dazzled for
the light-blue or pink annulus was stronger than that for the other colors, while the
light-blue (pink) annulus did not signifi cantly diff er in that feeling from the yellow,
green, or gray annulus when the disk color was light-blue (pink). This indicates that
the same disk color as the annulus color tended to reduce the feeling of being dazzled