Scales.js: Is it possible to have discrete colour schemes, eg SchemeBlues[k] for mapviewer

attrs: {
            fillColor: {                // Fill the regions
              metric: 'loan_amount',          // with the "score" column from state_score.json
              range: 'RdYlGn',           // using a RdYlGn gradient
              scheme: 'schemeBlues',
              scale: 'ordinal'
            }}

Did not work, as line 58 of scale.js result = d3['scale' + scale](d3[color]).domain(domain) doesn't let me use array notation.