Please do not close this bug. This bug should only be closed by TCS, C+AI Accessibility tester after bug verification.
"Check out Accessibility Insights! - Identify accessibility bugs before check-in and make bug fixing faster and easier."
GitHub Tags
#A11yTCS;#Visual Studio Code Client; #E2E_VisualStudioCodeClient_Win32_Dec2025;#DesktopApp;#FTP;#Win32;#A11ySev2; #A11yMAS; #WCAG1.4.11; #Non-TextContrast; #SCIM:Bug5119838;
Issue Subcategory
Slider or range control
User Experience
Users with cataracts may be unable to locate a volume or zoom slider when the track and thumb are barely visible against the background, making it difficult to identify the current position or drag the control to a new value.
Repro Steps
Launch Visual Studio Code > Apply Light 2026/Dark 2026 themes >Create a New Jupyter notebook file > Open Created file > Observe issue: Scrollbar color contrast is less than 3:1 in Light 2026 and Dark 2026 themes
Actual Result
The contrast ratio between the scrollbar thumb and its background is less than 3:1, making the scrollbar difficult to perceive.
Expected Result
The scrollbar thumb should have a contrast ratio of at least 3:1 against the adjacent background, ensuring it is clearly visible.
How to Fix
Darken the track and thumb colors; ensure both parts meet 3:1 contrast.
Environment details
Application Name: VS Code
Version: 1.121.0
Edition Windows 11 Enterprise
Version 25H2
OS build 26200.8390
Attachment
Please do not close this bug. This bug should only be closed by TCS, C+AI Accessibility tester after bug verification.
"Check out Accessibility Insights! - Identify accessibility bugs before check-in and make bug fixing faster and easier."
GitHub Tags
#A11yTCS;#Visual Studio Code Client; #E2E_VisualStudioCodeClient_Win32_Dec2025;#DesktopApp;#FTP;#Win32;#A11ySev2; #A11yMAS; #WCAG1.4.11; #Non-TextContrast; #SCIM:Bug5119838;
Issue Subcategory
Slider or range control
User Experience
Users with cataracts may be unable to locate a volume or zoom slider when the track and thumb are barely visible against the background, making it difficult to identify the current position or drag the control to a new value.
Repro Steps
Launch Visual Studio Code > Apply Light 2026/Dark 2026 themes >Create a New Jupyter notebook file > Open Created file > Observe issue: Scrollbar color contrast is less than 3:1 in Light 2026 and Dark 2026 themes
Actual Result
The contrast ratio between the scrollbar thumb and its background is less than 3:1, making the scrollbar difficult to perceive.
Expected Result
The scrollbar thumb should have a contrast ratio of at least 3:1 against the adjacent background, ensuring it is clearly visible.
How to Fix
Darken the track and thumb colors; ensure both parts meet 3:1 contrast.
Environment details
Application Name: VS Code
Version: 1.121.0
Edition Windows 11 Enterprise
Version 25H2
OS build 26200.8390
Attachment