Default folder icon colors are not displayed in the preferences window.

STR:
0. Thunderbird 102.0b2, clean profile

1. Switch from the new account tab to the main tab
2. Create a new feed account with default settings to make the folder panel visible
3. Right-click on the feed account and add a new folder with any name
4. Right-click on the new folder and select the last item from the context menu (likely: "Preferences", but I'm not on an en-US locale while reporting this)

Expected:
The preferences window displays the same orange symbol color the folder is displayed at in the folder panel.

Actual:
The preferences window displays a dark blue symbol color (changing the color reveals that it is a custom color; changing the color to any other setting does work as expected).

Thanks for opening this bug.
For some context, this happens because I originally set the default folder color as a static value.
https://searchfox.org/comm-central/search?q=var+kDefaultColor&path=&case=true&regexp=false

This doesn't obviously work anymore, and the default color (non customized) of a folder will need to be fetched when the dialog loads.

Assigning this to Micah if he wants to take a stab at this issue.
This is mostly JavaScript with some annoying complications in terms of getting the actual color of the icon from the DOM.

Severity N/A is reserved for reports of type enhancement or task, so the lowest possible severity for a bug is S4.
P4 should suffice for this cosmetic issue.

STR

• Right-click on any folder in 3-pane folder pane whose color still uses default settings (not customized) - best seen on custom folders added by user.
• Choose Properties from folder context menu
• Check the color displayed on the color picker button labeled Icon color: and compare with the actual folder color

Actual

• Color picker button incorrectly displays the color black, regardless of the actual default folder color

Expected

• Color picker button to display the actual default folder color used (as it does after customizing the color).

Thanks for the STR.
P3 is considered Backlog, while P4 is reserved for website issues: https://firefox-source-docs.mozilla.org/bug-mgmt/guides/priority.html

Pushed by alessandro@thunderbird.net:
https://hg.mozilla.org/comm-central/rev/49f98461dd1b
Set correct default folder colors. r=aleca

It currently works by luck (found this issue when testing if I could drop the bug 1752288 hack from the xhtml file.)

Pushed by mkmelin@iki.fi:
https://hg.mozilla.org/comm-central/rev/1f623a259dc6
follow-up - set styles when dialog loaded. r=aleca

Temporarily reopening this for a tiny follow up.

Pushed by mkmelin@iki.fi:
https://hg.mozilla.org/comm-central/rev/f141650585fb
follow-up - set virtual folder styles when dialog loaded. r=aleca