If you see the below white icons in the colour swatch, it’s best to turn these off in Settings.
Go to the Ellipse icon and click.
Go to Settings
edge://settings/appearance/hoverMenu
Appearance / Hover menu
Uncheck the below:
Show hover menu on image hover.
Show Visual Search in context menu.
The white icons are now gone and you will be able to see a white circle and use your mouse crosshairs to drag to alter the colour.
Queensland Spatial Help Centre | Land Parcel Enquiry tool (LPE) knowledgebase