Yes. But Brown v. Board of Education was not the ruling that ended the segregation. There are two types of segregation. One is "de jure" or by law segregation, meaning segregation based on laws on the books. The other is "customary" segregation, or segregation that was not based on laws but custom. California had de jure segregation, and was one of the earliest states to grapple with segregation, which makes sense since it had a large population of Hispanics. In Mendez v. Westminster, a 1945 case, the 9th Circuit Court of Appeals affirmed a decision that segregation of schools was unconstitutional. Brown v. Board of Education quoted Mendez and adopted much of its reasoning. In 1947, California's segregation of Hispanic schools ended. Following Mendez, a case in Texas, Delgado v. Bastrop Independent School District, led to a ruling that customary segregation was unconstitutional (Texas did not have de jure segregation). I am less familiar with the histories in the other states. I will note that the Treaty of Guadalupe required that Hispanics be classified as white in the Soutwest, which is why most segregation was customary, not de jure.