I have a script that outputs code with lots of ASCII escape sequences pertaining to color (for example, `\033[91m` changes the color of the text to red when printed to a terminal). I'd like to try to output this to HTML, so I tried this:

```
str = str.replace(new RegExp('\033[91m', 'g'),
                 '<span style="color:#ff0011">')
         /*.replace more such codes*/;

```

However, I get the following error:

> 
> SyntaxError: Invalid regular expression: `/[91m/`: Unterminated character class
> 
> 
> 

How can I fix that?