OCC doesn't translate the color for the root label correclty when loading STEP model

In the OCC V7.5 VCC7.6 the color for the model root label doesn't translate as the same as in OCC V6.8
In the attached model the root label (0:1:1:1) refers to different color

Dump info in OCC7.6
# 12 (label: 0:1:1:1)
TDataStd_TreeNode Trans. 0; Valid; ID = efd212e5-6dfd-11d4-b9c8-0060b0ee281b
Father=0:1:2:2 Previous=0:1:1:1:159 Next=0:1:1:1:169

# 482 (label: 0:1:2:2)
TDataStd_Name Trans. 0; Valid; ID = 2a96b608-ec8b-11d0-bee7-080009dc3333
Name=|LIGHTSTEELBLUE2 (#96A2DAFF)|2a96b608-ec8b-11d0-bee7-080009dc3333

Dump info in OCC6.8
# 14 (label: 0:1:1:1)
TDataStd_TreeNode Trans. 0; Valid; ID = efd212e5-6dfd-11d4-b9c8-0060b0ee281b
Father=0:1:2:4

# 490 (label: 0:1:2:4)
TDataStd_Name Trans. 0; Valid; ID = 2a96b608-ec8b-11d0-bee7-080009dc3333
Name=|GRAY25 (0.25098,0.25098,0.25098)|

Step to Reproduce:
Read the STEP file in OCC6.8 and OCC7.6, dump the color for the label(label: 0:1:1:1).

Attachments: