This is a pretty minor issue but the #FF808080 gray appears twice in the default color picker (once at the bottom of first column and once at top of 2nd column) which can lead to a little strangeness.
If you start the color picker with this color selected, it will show both boxes as selected.
The other strangeness I was able to duplicate in the WPF demos (R1 2022SP1) is if I have the 2nd column box gray selected and close the color picker, then when I reopen it the gray at the bottom of the 1st column will be selected.
So start with this:
Click gray at bottom of 1st column, then reopen the screen. The box at the top of the 2nd color will remain selected.
There is a little bit of strangeness too when you have that shade of gray selected and then you click down into one of the "standard colors", it appears to leave the selected border around the original gray color (but does correctly put the selected border around the standard color).
Am I misinterpreting this or is this a bug?