Accessibility Testing - Applying High contrast

### Expected behavior

While doing Accessibility Testing - applied High Contrast Mode

While the user is applying High contrast (Aquatic mode) the the chart legend and axis labels should visible clearly.



### Current behavior

While the user is applying High contrast (Aquatic mode) the the chart legend and axis labels are not visible clearly.

### Reproducible sample

https://www.chartjs.org/docs/2.9.4/charts/bar.html

### Optional extra steps/info to reproduce

From Windows Setting -> Color Contrast mode enable Color Contrast and select High Contrast from dropdown to enable High Contrast Mode
and issue can repro in sample site - https://www.chartjs.org/docs/2.9.4/charts/bar.html

### Possible solution

_No response_

### Context

Accessibility Testing

### chart.js version

v3.7.1

### Browser name and version

Chrome

### Link to your project

_No response_