The IfcColourRgbList defines an ordered collection of RGB colour values. Each colour value is a fixed list of three colour components (red, green, blue). The attribute ColourList is a two-dimensional list, where:
- first dimension is an unbounded list representing each colour value;
- second dimension is a fixed list of three list members, where  is the red component,  the green component, and  the blue component.
|1||ColourList||LIST [1:?] OF LIST [3:3] OF IfcNormalisedRatioMeasure||
List of colours defined by the red, green, blue components. All values are provided as a ratio of 0.0 ≤ value ≤ 1.0. When using 8bit for each colour channel, a value of 0.0 equals 0, a value of 1.0 equals 255, and values in between are interpolated.
ENTITY IfcColourRgbList SUBTYPE OF (IfcPresentationItem); ColourList : LIST [1:?] OF LIST [3:3] OF IfcNormalisedRatioMeasure; END_ENTITY;