Not always blue.
Lupinus texensis (Fabaceae), commonly known as the Texas bluebonnet, is the official state flower (or rather, state plant) of Texas. Given its vernacular name, many people would expect the flower color (or more precisely, the petal color) of Lupinus texensis to be blue. More often than not, the petal color of that beautiful legume is indeed blue.
However, populations with mutations in petal color can occasionally be found, such as the one I observed in the city of Temple, TX in March 2022. Here, the petal color was either blueish or pinkish-white. Very likely, the pinkish-white variety of Lupinus texensis resulted from selective breeding and was deliberately planted there or escaped into the wild from a nearby garden.