ContentDialog Text Color Contrast

Describe the bug The color contrast of hyperlinks and text in a ContentDialog does not meet the color contrast ratio of 4.5:1 for accessibility.

https://github.com/microsoft/terminal/issues/5395 is dependent on a fix for this issue.

Steps to reproduce the bug This can be seen in Windows Terminal’s TerminalPage.xaml , but this just uses the built-in theme dictionaries.

Steps to reproduce the behavior:

1. Open your app of choice that uses a ContentDialog using HyperlinkButtons
2. Open Accessibility Insights (download link here) to check the color contrast ratio
3. Verify whether the color contrast ratio for the SplitButton control meets the 4.5:1 contrast ratio

Expected behavior In Windows Terminal, the links present in the “About” pop up window and the text to the back ground color in the “OK” button should meet the color contrast ratio 4.5:1

Screenshots

Version Info

NuGet package version:

Windows 10 version	Saw the problem?
Insider Build (xxxxx)
November 2019 Update (18363)
May 2019 Update (18362)
October 2018 Update (17763)
April 2018 Update (17134)
Fall Creators Update (16299)
Creators Update (15063)

Device form factor	Saw the problem?
Desktop
Mobile
Xbox
Surface Hub
IoT

[mdtauk]

When choosing an Accent Color, it does warn where there could be visibility problems - so if the user has chosen such a colour - then we can presume they take that risk.

The Windows team should have chosen an accent colour that meets contrast ratio recommendations right?

[StephenLPeters]

@YuliKl ?