Axe fails with new color spec

### Product

axe-core

### Product Version

_No response_

### Latest Version

- [X] I have tested the issue with the latest version of the product

### Issue Description

#### Expectation

I’m using `oklch` on my page. I have added a media query to test if the browser supports it, and fall back to `rgb()` if not. I expect `axe-core` to either ignore my `oklch` definitions, or be able to parse them properly.

#### Actual

`axe-core` fails with:

`axe-core Error: Unable to parse color "oklch(0.992 0.03 171.25)”`

#### How to Reproduce

```html

div {
background: #000;
text: white;
}
@supports (color: oklch(0% 0 0)) {
div {
background: oklch(0% 0 0);
}
}

```

#### Additional context

This prevents me from using the new color syntax since my accessibility tests completely break.