Gtk4 default dark theme: contrast too low for selection and button hover

Cosmetic issue, but relatively annoying... (eyestrain)

Some screenshots of gtk4-widget-factory for reference:

Gtk4 default light theme: good contrast ✅

• selection "50" clearly visible
• hover of button "save" visible (background shaded)

Gtk4 default dark theme: too low contrast 🚫

• selection "50" extremely faint
• hover of button "save" invisible

Old Gtk3 default dark theme (for reference): better contrast

• selection "50" clearly visible
• hover of button "save" visible (outlined)

Versions

• gtk4 4.10.1
• gtk3 3.24.37