Google Chrome 64.0.3245.0 (Official Build) canary (64-bit) (cohort: 64-Bit)
Windows 10 Enterprise Version 1607 Build 14393.1770
When Windows is set to High Contrast (High Contrast Black), the following areas don't reflect it:
Toolbar buttons - Go back
Toolbar buttons - Go forward
Toolbar buttons - Reload
Toolbar buttons - Go to homepage
Toolbar buttons - Open a menu item from Chrome menus
Toolbar buttons - Access an existing extension
Toolbar buttons - Remove an extension
Tab strip
NTP
Scroll bars
The following areas do reflect it:
Omnibox
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Find in page - Find a string from the page using "Find in page"
Area the top of the browser that surrounds the tab strip
The minimize, maximize, and close buttons at the top.
Compare this to Firefox 56.0 where everything reflects the high contrast theme.
Google Chrome 64.0.3245.0 (Official Build) canary (64-bit) (cohort: 64-Bit)
Windows 10 Enterprise Version 1607 Build 14393.1770
When Windows is set to High Contrast (High Contrast Black), the following areas don't reflect it:
Toolbar buttons - Go back
Toolbar buttons - Go forward
Toolbar buttons - Reload
Toolbar buttons - Go to homepage
Toolbar buttons - Open a menu item from Chrome menus
Toolbar buttons - Access an existing extension
Toolbar buttons - Remove an extension
Tab strip
NTP
Scroll bars
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
The following areas do reflect it:
Omnibox
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Find in page - Find a string from the page using "Find in page"
Area the top of the browser that surrounds the tab strip
The minimize, maximize, and close buttons at the top.
Compare this to Firefox 56.0 where everything reflects the high contrast theme.
Google Chrome 64.0.3245.0 (Official Build) canary (64-bit) (cohort: 64-Bit)
Windows 10 Enterprise Version 1607 Build 14393.1770
When Windows is set to High Contrast (High Contrast Black), the following areas don't reflect it:
Toolbar buttons - Go back
Toolbar buttons - Go forward
Toolbar buttons - Reload
Toolbar buttons - Go to homepage
Toolbar buttons - Open a menu item from Chrome menus (menu items do reflect it)
Toolbar buttons - Access an existing extension
Toolbar buttons - Remove an extension
Tab strip
NTP
Scroll bars
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Download bar - partial, bar itself does not but the Show all button does
Extensions
The following areas do reflect it:
Omnibox
More menu contents (but not the button)
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Find in page - Find a string from the page using "Find in page"
Area the top of the browser that surrounds the tab strip
The minimize, maximize, and close buttons at the top.
Download bar - partial, bar itself does not but the Show all button does
Compare this to Firefox 56.0 where everything reflects the high contrast theme.
Google Chrome 64.0.3245.0 (Official Build) canary (64-bit) (cohort: 64-Bit)
Windows 10 Enterprise Version 1607 Build 14393.1770
When Windows is set to High Contrast (High Contrast Black), the following areas don't reflect it:
Toolbar buttons - Go back
Toolbar buttons - Go forward
Toolbar buttons - Reload
Toolbar buttons - Go to homepage
Toolbar buttons - Open a menu item from Chrome menus (menu items do reflect it)
Toolbar buttons - Access an existing extension
Toolbar buttons - Remove an extension
Tab strip
NTP
Scroll bars
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Download bar - partial, bar itself does not but the Show all button does
Extensions
The following areas do reflect it:
Omnibox
Permissions dialog
More menu contents (but not the button)
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Find in page - Find a string from the page using "Find in page"
Area the top of the browser that surrounds the tab strip
The minimize, maximize, and close buttons at the top.
Download bar - partial, bar itself does not but the Show all button does
Compare this to Firefox 56.0 where everything reflects the high contrast theme.
Google Chrome 64.0.3245.0 (Official Build) canary (64-bit) (cohort: 64-Bit)
Windows 10 Enterprise Version 1607 Build 14393.1770
When Windows is set to High Contrast (High Contrast Black), the following areas don't reflect it:
Toolbar buttons - Go back
Toolbar buttons - Go forward
Toolbar buttons - Reload
Toolbar buttons - Go to homepage
Toolbar buttons - Open a menu item from Chrome menus (menu items do reflect it)
Toolbar buttons - Access an existing extension
Toolbar buttons - Remove an extension
Tab strip
NTP
Scroll bars
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Download bar - partial, bar itself does not but the Show all button does
Extensions
Voice search from NTP
The following areas do reflect it:
Omnibox
Permissions dialog
Right side of Omnibox indicator (e.g. unloaded script https://mixed-script.badssl.com/
More menu contents (but not the button)
Bookmark quick add button
Magnifier icon in omnibox
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Find in page - Find a string from the page using "Find in page"
Area the top of the browser that surrounds the tab strip
The minimize, maximize, and close buttons at the top.
Download bar - partial, bar itself does not but the Show all button does
Compare this to Firefox 56.0 where everything reflects the high contrast theme.
Master tracking bug for all Windows High Contrast requests/bugs
Google Chrome 64.0.3245.0 (Official Build) canary (64-bit) (cohort: 64-Bit)
Windows 10 Enterprise Version 1607 Build 14393.1770
When Windows is set to High Contrast (High Contrast Black), the following areas don't reflect it:
Toolbar buttons - Go back
Toolbar buttons - Go forward
Toolbar buttons - Reload
Toolbar buttons - Go to homepage
Toolbar buttons - Open a menu item from Chrome menus (menu items do reflect it)
Toolbar buttons - Access an existing extension
Toolbar buttons - Remove an extension
Tab strip
NTP
Scroll bars
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Download bar - partial, bar itself does not but the Show all button does
Extensions
Voice search from NTP
The following areas do reflect it:
Omnibox
Permissions dialog
Right side of Omnibox indicator (e.g. unloaded script https://mixed-script.badssl.com/
More menu contents (but not the button)
Bookmark quick add button
Magnifier icon in omnibox
Bookmark bar - Open a page via bookmark bar - partial, the bookmark text reflects high contrast, the icons do not. Also, the more button on the bookmark bar does not
Find in page - Find a string from the page using "Find in page"
Area the top of the browser that surrounds the tab strip
The minimize, maximize, and close buttons at the top.
Download bar - partial, bar itself does not but the Show all button does
Compare this to Firefox 56.0 where everything reflects the high contrast theme.
I merged many duplicates into this issue, so after this bug is fixed and a tester is verifying, please be sure to check each specific case in the duplicate bugs:
Bug 473681 contains screenshots comparing Firefox to Chrome
Bug 752620 specifically around date pickers
Bug 738321 specifically that lack of support can cause black text on black background
Bug 738292 for a CL for dialog button text color
Bug 473681 for a list of other bugs merged into it
Comment 1 by leberly@chromium.org
, Oct 20 2017