One of the country’s largest celebrations in honor of Martin Luther King Jr. — the Marade — will kick off this chilly morning by “I Have a Dream,” the MLK memorial in City Park in Denver, a mid-sized city with a relatively small Black population, but a big record of fighting for equality. Wilma Webb, then a state legislator, was instrumental in pushing to make MLK Day a holiday in this state; it took her four tries before the Colorado Legislature finally approved creating a King holiday in 1984…