20127d7387
On system themes, using `toolbar-field-color` for the `identity-tab-color` results in a container indicator that's the same color as the tab. But for every other theme, `--toolbar-field-color: light-dark(rgb(21, 20, 26), rgb(251, 251, 254));`. This patch ensures we do the same container indicator color for all themes. Differential Revision: https://phabricator.services.mozilla.com/D233566
