More than 55,000 people in Washington state enrolled in health coverage in October — most in Medicaid — and about 40,000 more applied for coverage, making the Evergreen State one of the brightest success stories in the rocky national rollout of the federal health law. Here in the home of online shopping giant Amazon.com, officials credit the exchange's success in part to the Pacific Northwest's high-tech bent. Colorado enrolled just over 37,500 people in the same period. New York state — with a population nearly three times the size of Washington's — had enrolled just more than 48,000 in health plans as of Tuesday, state officials announced. Kentucky enrolled more than 32,000 in its first month. California is expected to release figures this week.