What is the color space used in the XmlXCAF file?

AI and some googling told me that the color space in a XmlXCAF file is sRGB. But it seems not align with what I observed. I used CadQuery-OCP to create a simple box and saved it to a XmlXCAF file with a name and a color assigned to the box.

box = BRepPrimAPI_MakeBox(10, 10, 10).Shape()

theColor = Quantity_Color()
Quantity_Color.ColorFromHex_s("#D43D3D", theColor)

r, g, b = theColor.Values(Quantity_TOC_RGB)
print("linear RGB: ", r, g, b)  # output: linear RGB:  0.658 0.046 0.046 i.e. #A70B0B

r, g, b = theColor.Values(Quantity_TOC_sRGB)
print("sRGB space: ", r, g, b)  # output: sRGB space:  0.831 0.239 0.239 i.e. #D43D3D

doc_format = TCollection_ExtendedString("XmlXCAF")
doc = TDocStd_Document(doc_format)

application = XCAFApp_Application.GetApplication_s()
XmlXCAFDrivers.DefineFormat_s(application)
application.InitDocument(doc)

shape_tool = XCAFDoc_DocumentTool.ShapeTool_s(doc.Main())
color_tool = XCAFDoc_DocumentTool.ColorTool_s(doc.Main())

XCAFDoc_DocumentTool.SetLengthUnit_s(doc, 0.001)

_root_label = shape_tool.AddShape(box)

TDataStd_Name.Set_s(
    _root_label,
    TCollection_ExtendedString("solid-box"),
)

color_tool.SetColor(
    _root_label,
    theColor,
    XCAFDoc_ColorType.XCAFDoc_ColorGen,
)

status = application.SaveAs(doc, TCollection_ExtendedString("box.xml"))
print(status)

In the resulting file, I got the following. The only color in the file is #A70B0BFF which is the same as the linear RGB from the above python code. Does it mean the XmlXCAF file saves the color in linear RGB?

   <label tag="1">
    <TDataStd_Name id="5" nameguid="2a96b608-ec8b-11d0-bee7-080009dc3333">Shapes</TDataStd_Name>
    <XCAFDoc_ShapeTool id="6"/>
    <TDF_TagSource id="7">1</TDF_TagSource>
    <label tag="1">
     <TNaming_NamedShape id="8" evolution="primitive">
      <olds/>
      <news>
       <shape tshape="+34" index="1"/>
      </news>
     </TNaming_NamedShape>
     <TDataStd_Name id="9" nameguid="2a96b608-ec8b-11d0-bee7-080009dc3333">solid-box</TDataStd_Name>
     <TDataStd_TreeNode id="10" treeid="efd212e4-6dfd-11d4-b9c8-0060b0ee281b"/>
    </label>
   </label>
   <label tag="2">
    <TDataStd_Name id="11" nameguid="2a96b608-ec8b-11d0-bee7-080009dc3333">Colors</TDataStd_Name>
    <XCAFDoc_ColorTool id="12"/>
    <TDF_TagSource id="13">1</TDF_TagSource>
    <label tag="1">
     <xcaf:Color id="14">30</xcaf:Color>
     <TDataStd_Name id="15" nameguid="2a96b608-ec8b-11d0-bee7-080009dc3333">BROWN3 (#A70B0BFF)</TDataStd_Name>
     <TDataStd_TreeNode id="16" treeid="efd212e4-6dfd-11d4-b9c8-0060b0ee281b" children="10 "/>
    </label>
   </label>
   <label tag="3">
    <TDataStd_Name id="17" nameguid="2a96b608-ec8b-11d0-bee7-080009dc3333">Layers</TDataStd_Name>
    <XCAFDoc_LayerTool id="18"/>
   </label>