
On this day (November 3), 1956, the first television broadcast of "The Wizard of Oz" was shown.
The Wizard was one of the few films shot in Technicolor, a triple dye transfer process once reserved for only the most premier movies. MGM took full advantage, even switching Judy Garland’s size 4B shoes from silver (as written in the original L. Frank Baum book) to ruby red for a more dramatic effect.
Since very few Americans owned color TVs, Master Music Store in Vineland, NJ invited families to watch the show on color floor models in its Landis Avenue store. No strings attached. This way the kids could see the horse of a different color in every vibrant hue.

The "horse coloring" was actually a paste made from different flavors of Jell-O. The filmmakers used a white horse and sponged it down with different colors of Jello. They had a hard time keeping the horse from trying to lick it off.

The Horse of a Different Color changes 6 colors: Green, blue, orange, red, yellow, and violet.
This information was obtained from TheDailyJournal.com
Baum thought up the name for Oz when looking at his filing cabinets, organised A-N and O-Z
The Wizard was one of the few films shot in Technicolor, a triple dye transfer process once reserved for only the most premier movies. MGM took full advantage, even switching Judy Garland’s size 4B shoes from silver (as written in the original L. Frank Baum book) to ruby red for a more dramatic effect.
Since very few Americans owned color TVs, Master Music Store in Vineland, NJ invited families to watch the show on color floor models in its Landis Avenue store. No strings attached. This way the kids could see the horse of a different color in every vibrant hue.

The "horse coloring" was actually a paste made from different flavors of Jell-O. The filmmakers used a white horse and sponged it down with different colors of Jello. They had a hard time keeping the horse from trying to lick it off.

The Horse of a Different Color changes 6 colors: Green, blue, orange, red, yellow, and violet.
This information was obtained from TheDailyJournal.com
I also looked up a little Oz trivia just for fun.
When the script was written, the part of the Wizard had been earmarked for WC Fields
Baum thought up the name for Oz when looking at his filing cabinets, organised A-N and O-Z
Judy Garland's white dress was actually pink as it was easier to shoot in Technicolor.
A Cairn terrier called Terry played the role of the do Toto.