Regression: The toggle button border in the navigation sidebar has a too low color contrast in light mode [#3636143]

Problem/Motivation

There is a regression from[#3506321]. The toggle button in the lower left corner of the screen is using --admin-toolbar-color-gray-300 in light and in dark mode.

light mode
the bottom of the navigation sidebar in light mode showing the help menu item, the user sub menu item and the toggle button to collapse the sidebar
#b8c1d0/#2a2a2d 1.81:1 🚫

dark mode
the bottom of the navigation sidebar in dark mode showing the help menu item, the user sub menu item and the toggle button to collapse the sidebar
#b8c1d0/#2a2a2d 7,89:1 ✅

Steps to reproduce

Go to admin/appearance/settings/default_admin and ensure that the navigation module is installed and then switch between light and dark mode and take a look at the toggle button in the bottom left corner of the screen.

Proposed resolution

Ensure that the color contrast for the border of the toggle button is at least 3:1 in light mode same as in dark mode.

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet

Comment	File	Size	Author
	light.jpg	8.23 KB	rkoller
	dark.jpg	7.01 KB	rkoller

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3636143-regression-the-toggle changes, plain diff MR !17738
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