Origin support dark mode since Origin2024, therefore, origin also provide way to use different toolbar button bitmap for light mode and dark mode. User can create 4 toolbar button bitmap files when making toolbar package/App, they are used in different situations as follows.

toolbar_name.bmp: origin light mode, essential
<toolbar_name>_dk.bmp: origin dark mode
<toolbar_name>_dk_hi.bmp: origin dark mode with High DPI
<toolbar_name>_hi.bmp: origin light mode with High DPI
note: High DPI means Resolution>1920X1080 and dpi>=150

The bitmap files should be all 16 colors bitmap. light mode’s bitmap is essential, origin will use this bitmap if other mode’s bitmap is illegal or missing.