Long standing miss from me, really useful when switching from an app to the other (Ps/Ai/inD)
Shortcuts for
D : Default color (black/White),
Shift-X : switch the colors
And may be 2 of the 3 most basic ones :
, ; : (on the bottom right of a french keyboard) which set :
, (comma) : picks the fill color (flat)
: (colon) : picks the transparent color
; (semicolon) : picks a gradient (in Muse, may be switches from flat to gradient’s last settings ?)
the ability to pick a color would require another default :
X : switches the focus to fill/stroke color so we can remove (transparent) a stroke color, turn it into a flat fill, etc.