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I know I can escape a CSS string with hex numbers. For example. "abc" can be escaped as "\61\62\63".
How about CSS numbers? Can we escape a number like 100 in 'width: 100%;'?
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In CSS, **you cannot escape numeric values** (like `100` in `width: 100%`) the way you escape strings or identifiers.

### Why?

CSS escapes like `\61\62\63` are meant for:

* Identifiers (`class`, `id`, `tag names`)
* Strings (`content`, etc.)

But **numeric values** (like those used in `width`, `margin`, `font-size`, etc.) must be written as actual numbers — not escaped.

### Examples:

```css
/* ✅ Valid */
width: 100%;

/* ❌ Invalid – escaping numbers doesn’t work */
width: \31\30\30%;  /* Does NOT equal 100% */
```

Browsers do **not** interpret `\31\30\30` as "100" when parsing property values that expect a number.

### Exception: When escaping numbers **in identifiers**

For example, if you want to define a class name that starts with a number:

```css
.\31 00px {
  width: 100px;
}
```

This is valid. Here `\31` is an escape for `1`, and the selector becomes `.100px`.

But for actual values like `width:`, **you must use plain numbers**.

Let me know if you want help escaping CSS selectors or identifiers!