Painting travel trailer white to reduce heat in summer?

Our first rv was white. After a month of traveling mid April to mid May we settled in to our first volunteer camp hosting position. It was a well shaded site 50amp FHU. It was a a hot humid summer along the river but our 5er stayed cool. Cool enough that the exterior was covered with condensation.
Like to say that was always true but 104 temp in Arizona and little humidity mid 80s were the best we could do. Not the temp as much as not a bit of shade.