{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Quarterly revenue — colorblind-safe theme",
  "data": {
    "values": [
      {"quarter": "Q1", "revenue": 120, "segment": "north"},
      {"quarter": "Q2", "revenue": 145, "segment": "north"},
      {"quarter": "Q3", "revenue": 138, "segment": "north"},
      {"quarter": "Q4", "revenue": 172, "segment": "north"},
      {"quarter": "Q1", "revenue": 100, "segment": "south"},
      {"quarter": "Q2", "revenue": 120, "segment": "south"},
      {"quarter": "Q3", "revenue": 165, "segment": "south"},
      {"quarter": "Q4", "revenue": 190, "segment": "south"}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {"field": "quarter", "type": "nominal"},
    "y": {"field": "revenue", "type": "quantitative", "aggregate": "sum"},
    "color": {"field": "segment", "type": "nominal"}
  },
  "theme": {"name": "colorblind"}
}