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footfootfoot · 08-14-2006, 08:59 PM

OK you both are sort of correct. The color of the sign is indigo, similar to this but more intense since it is back lit. It is almost the exact same color as those purple lights which indicate security phones on campuses.

Anonymous is bringing up a related phenomena of adjacent color effects. In this case though it is the single color sign against black night sky.

I'm thinking it has to do with the focal point of the wavelength of light being outside of the range my eye can focus it. I am also wondering if, being night, more rods are involved than cones and that may have something to do with it.

08-14-2006, 08:59 PM	#4
footfootfoot To shreds, you say? Join Date: Aug 2004 Location: in the house and on the street-how many, many feet we meet! Posts: 18,449	OK you both are sort of correct. The color of the sign is indigo, similar to this but more intense since it is back lit. It is almost the exact same color as those purple lights which indicate security phones on campuses. Anonymous is bringing up a related phenomena of adjacent color effects. In this case though it is the single color sign against black night sky. I'm thinking it has to do with the focal point of the wavelength of light being outside of the range my eye can focus it. I am also wondering if, being night, more rods are involved than cones and that may have something to do with it. Attached Images __________________ The internet is a hateful stew of vomit you can never take completely seriously. - Her Fobs