# 8.12.3.3 IfcColourRgbList

AbRV ⓘ
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## 8.12.3.3.1 Semantic definition

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 [1] is the red component, [2] the green component, and [3] the blue component.

## 8.12.3.3.5 Formal representation

ENTITY IfcColourRgbList
SUBTYPE OF (IfcPresentationItem);
ColourList : LIST [1:?] OF LIST [3:3] OF IfcNormalisedRatioMeasure;
END_ENTITY;