SANTA ANA—Orange County may find itself close to the less- restrictive red tier in the state’s program for reopening the economy on March 2. As of Feb. 28, the state’s case rate per 100,000 residents was 8.2, the testing positivity rate was at 4.1 percent and the health equity quartile positivity rate, which measures coronavirus prevalence in hot spots in low-income communities, was 5.3 percent, said Orange County chief executive Frank Kim. “It was a rainbow,” Kim told City News Service. “For the case rate we were purple, but testing positivity was orange and for the health equity we were red.” As of March 1, the case rate was 7.6, testing positivity rate was 3.9 percent and the health equity rate was 5 percent, “which is the lowest health equity rate we’ve had since we were measured for that,” Kim said. The county’s test positivity rate—which is reported weekly on …