Contact is a new icon set that copies Contour and changes the coloring for visibility.
Pictured are Contour on top, which becomes illegible in Dark Mode on the second row, followed by Contact which is blue and easier to see using Light (3) or Dark (4) mode.
If you are using Contour but moving to macOS Sonoma and Dark Mode try Contact.
Big Business 14 updates Tool Icons, to add choices for Dark Mode on the Mac, or and some better looks for Windows. Icon Prefs let you choose the Icons you want to use.
Go to Employee toolbar, My Prefs, and select your preferred icon set.
This Solution describes this option. (7807)
Diamond is a new icon set that copies Carbon and changes the coloring for visibilitly.
Pictured are Carbon in Light Mode, Carbon in Dark Mode, Diamond in Light Mode, and Diamond in Dark Mode.
My Prefs empower you to set the look and feel you want while using Big Business 14.
Big Business 14 includes a variety of updates to keep features you like so they work the same and add new options to work different when you are ready or need a change.