Do you mean actual Caucasians (from Armenia, Azerbaijan, Georgia, etc.) or white people?
https://www.collegedata.com/cs/data/college/college_pg06_tmpl.jhtml?schoolId=635 says that UCSB is 37.5% white and 22.5% Asian.
For comparison, https://www.collegedata.com/cs/data/college/college_pg06_tmpl.jhtml?schoolId=650 says that UCD is 30.6% white and 34.6% Asian.