"who looked like someone in Technicolor"

Public Domain"Gentlemen Prefer Blondes" (1953)
Technicolor was the brand name for a color film process that was the most widely used in Hollywood movies from 1922 to 1952. It was recognizable for an oversaturation of colors, typified by “Singin’ in the Rain” (1952), Disney animations of the period, and the color sections of “The Wizard of Oz” (1939).

At right is a scene with Marilyn Monroe from "Gentlemen Prefer Blondes," directed by Howard Hawks, which gives a sense of the color saturation of Technicolor.

The narrator likely describes the Texan from Texas this way to suggest that he is garish, hyperreal, a little much.