Label colors are lost when YAML file is opened

[basilevs]

Test steps

• Open a dataset in YOLO format using File/Open a folder that includes a yaml file
• Change color of labels using Settings/Objects/Color
• Open same dataset in YOLO format using File/Open a folder that includes a yaml file

Expected result

Colors of labels are preserved (because no classes or their names are changed)

Actual result

All colors revert to default cyan

Environment

RectLabel Version 2025.12.17 (2025.12.17)
MacOS 12.7.6 (21H1320)

[ryouchinsa]

Thanks for writing the issue.

File -> Open a folder which includes a yaml file, this menu is to import the exported folder which includes a yaml file and train/val/test folders at once.
When importing the yaml file, RectLabel adds a new project, so that the color settings is changed.
If you want to open train/val/test folders and use the currently used project, use FIle -> Open images folder and annotations folder.
Drag & drop the root folder which includes train/val/test folders to the open table.
Then color information is preserved because the current project is being used again.

drag_drop_root_folder.mp4