We need to reverse the color palette for dark theme.

In Jira color palette in light theme looks like:

and in dark theme:

Both checked buttons are signed as “dark green”. Atlassian reverse the color palette automatically when you switch a theme. So If you set a dark font on light background after switching to dark theme you’ll have a proper light font.

We need the same mechanism for External page.

This also causes a bug when editing the External share page

ESFJ-378:Edit toolbar - dark themeReleased

Also there was a mismatch in page theme editor theme when:
in global settings dark mode was disabled
users browser is set to darkmode