Any attributes or some settings to ignore the red coloring of the underline? or is it ignored due to browser settings?
There is an HTML5 spell check attribute.
<textarea spellcheck="false"> or <input type="text" spellcheck="false">
This is not CSS, but HTML: spellcheck="false" in your HTML element should do the trick. But I think that Safari, for example, is still drawing a red line below it.
spellcheck="false"
Yes, there is a spellchecking attribute in HTML5.
http://www.whatwg.org/specs/web-apps/current-work/multipage/editing.html#spelling-and-grammar-checking
This can only be done using HTML5. This way you can add the spellcheck attribute to the HTML element using jquery. try it
$("#textarea").attr("spellcheck", "false");