CIA Fact Book for Cuba: mulatto 51%, white 37%, black 11%, Chinese 1%
Wardaddy said "immigrants". He did not say "those who stayed behind in Cuba".
The Encyclopedia Britannica Yearbook for 1958 lists the racial makeup of Cuba as follows:
White.........72.8%
Black..........12.4%
Mulato.......14.5%
Asiatic........0.3%
During the 1930's, my paternal grandparents and their teenaged children left Cuba for a few years to live in Washington, D.C. where they lived in a white neighborhood. A few years ago, my aunt was visiting Washington, DC and drove by her old neighborhood to see if any old neighbor families still lived there. When she got to the old address, it dawned on her that no whites had lived in that neighborhood for the last 30 years.
Demographic change with time. There was a "white flight" out of Cuba to the U.S. just as there was a "white flight" out of D.C. into the Maryland and Virginia suburbs.