Colleges still use race in admissions. They just obfuscate it slightly. For example, they preferentially admit people by zipcode, i.e. by the degree to which the neighborhood is non-white, non-Jewish, and non-Asian. They encourage applicants to write about their experiences with discrimination in their applicant letters. They also accept people scoring in the top percentage of grades at a school (which preferentially admits students from worse schools with lower standards i.e. students from black and Hispanic schools). I assume they use a variety of other techniques as well.