Someone was probably working on it somewhere and it became available in the either the very late 1940's or early fifties. It was incredibally expensive and color qulity was poor. People had a greenish tint or a reddish tint but you could never get it just right. Keep in mind that in the 1950's a lot of US households didn't even have a black and white TV. I bought my first color set in 1967. It was a Bradford 13" portable that weighed about 200 pounds. The color quality was still poor and faded in and out all the time. The Bradford was the cheapest set I could find and it cost me $252.00. Today you can buy a much better 13" color portable for about $65.00.
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Color TV didn't really hit the market until the late 40's and was very expensive. (Wasn't all that good, either.) So to answer your question, not very.