A question about a song played in Lady Bird's honor

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There is a song that they were playing to acknowlege Lady Bird Johnson's death on the radio this morning, "The Yellow Rose of Texas." The lyrics of this song, and the first version played was probably the orginal ones. I was listening, because I don't think I've ever heard the whole song before. One of the lines is "The only rose of color for me." Now, back in the times when this song was writen, persons of mixed race, at least 1/8th or 1/12th black that showed color, were often called "High Yellows." I'm going to guess because they really didn't have a name for that light coffee color skin. It got me wondering if the song wasn't orginally writen to such a woman? Then, would that make a "Red Rose" an Amerind? and a "White Rose" an anglo? There is a history of an indentured mulatto servant name Emily that was the "Yellow Rose" and, of couse, a mulatto would be considered a "High Yellow." Just thought I'd throw that out. Of couse, Lady Bird Johnson is well known for her work getting wild flowers planted all over the U.S. and especially in Texas, so the guy was playing lots of flower songs & that one was both flowers and Texas.