Insufficient color contrast for checkbox border in Light 2026 and Dark 2026 themes:A11y_Azure Machine Learning Extension for VS Code_Select subscription_Non TextContrast

[kapilvaishna]

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; #A11yMAS; #A11ySev2; #DesktopApp; #Win32; #Azure Machine Learning Extension for VS Code; #E2E_Azure Machine Learning_Win32_May2026; #WCAG1.4.11; #Non-TextContrast; #External; #Extenral:VSCode; #FirstParty:Bug319909;

Issue Subcategory

Form field boundary low contrast

User Experience

Users with low vision cannot locate form field boundaries, making it difficult to identify where to enter text or which area is clickable.

Repro Steps

Open VS Code > Apply High Contrast Light 2026 or Dark 2026 theme > Install Azure Machine Learning extension > Azure > Machine Learning tree grid > Filter > Select All Checkbox > Observe issue: Color contrast for checkbox border is less than 3:1 in Light 2026/Dark 2026 theme

Actual Result

The border color of checkboxes has a contrast ratio of less than 3:1 against the adjacent background in Dark 2026/Light 2026 themes, making the control boundaries difficult to distinguish.

Expected Result

Form field boundaries should meet 3:1 contrast ratio against the adjacent background.

How to Fix

Increase border contrast to at least 3:1 (e.g., use border: 1px solid #767676 on white). Alternatively, add a background fill to the input that provides sufficient contrast with the page background.

Environment details

Application Name: Azure Machine Learning Extension for VS Code
VS Code version: 1.121
Extension version: 1.4.1
Edition Windows 11 Enterprise
Version 25H2
OS build 26200.8390

Attachment

[Siglud]

I think this issue originates from VSCode. After upgrading to version 1.122.0, here is what I’m seeing.

[kapilvaishna]

FanH (@Siglud)
External bug: microsoft/vscode#319909

[Siglud]

Hi kapilvaishna since the related external bug has been set to closed. Could you please close the issue too?

[Mana-swi]

#a11ydb-field-bound-contrast;

[Siglud]

Close the issue since no response for 2 weeks. Feel free to reopen it if this issue exists.