Chart Color System

{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['colors'], 'properties': {'ramp': {'type': 'boolean', 'default': False, 'description': 'true for a sequential or diverging scale (skips pairwise separation)'}, 'colors': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 24, 'minItems': 1, 'description': 'Palette colors in slot order (CSS syntax)'}, 'background': {'type': 'string', 'default': '#ffffff', 'description': 'Chart background color'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['kind', 'start', 'end'], 'properties': {'end': {'type': 'string', 'description': 'Last color (or the positive end)'}, 'mid': {'type': 'string', 'description': 'Middle color for a diverging scale; default a neutral near the background'}, 'kind': {'enum': ['sequential', 'diverging'], 'type': 'string'}, 'start': {'type': 'string', 'description': 'First color (or the negative end of a diverging scale)'}, 'steps': {'type': 'integer', 'default': 7, 'maximum': 24, 'minimum': 3}, 'background': {'type': 'string', 'default': '#ffffff'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['colors'], 'properties': {'modes': {'type': 'array', 'items': {'enum': ['normal', 'deutan', 'protan', 'tritan', 'achromatopsia'], 'type': 'string'}, 'description': 'Vision modes to simulate; default all'}, 'colors': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 24, 'minItems': 1, 'description': 'Colors in slot order (CSS syntax)'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'n': {'type': 'integer', 'default': 6, 'maximum': 12, 'minimum': 1, 'description': 'Number of categorical slots'}, 'grid': {'type': 'string', 'description': 'Gridline color; defaults to a light or dark gray to match the background'}, 'anchors': {'type': 'array', 'items': {'type': 'string'}, 'default': [], 'maxItems': 12, 'description': 'Brand or required colors, kept exactly, in slot order (CSS syntax)'}, 'posture': {'enum': ['kpi', 'comparative', 'exploratory'], 'type': 'string', 'default': 'comparative', 'description': 'kpi: few strong colors; comparative: balanced; exploratory: many muted'}, 'background': {'type': 'string', 'default': '#ffffff', 'description': 'Chart background color'}}, 'additionalProperties': False}