Change Background Color And Text on Purchase Confirmation Page

Hi, I'm trying to change the background color  on the purchase confirmation page to plain white, I tried using 

/* Order Confirmation Page */
div#confirmed-page {
    background: white;
}

And I just got the text block to be white, Is there any way to change the color on the whole page under the nav bar and  modify the text displayed on it? 

@tuanphan

to change text color, use

div#confirmed-page * {color: blue !important;}

well, thanks @tuanphan, it's actually helpful to know, but is there a way to change the blue color beneath the banner to plain white? 

thnx in advance...

Can you share link to order confirm page?

Yes, and also is it possible to change the text?, cause it looks like the automated message has grammatical errors

Link:  

https://www.circulonl.com/checkout/order-confirmed?oid=5e82c9c3c5a5f81740304f56&authCode=NWU4MmM5YzNjNWE1ZjgxNzQwMzA0ZjU2OjIwMjAtMDMtMzFUMDQ6NDA6MzQuMjU2Wr6-p4RPJax5uNYVhVMyTsmbrTJCpI8LGElFN0-KDJ1K

what is password?

sorry about that, 4321

Thank you @tuanphan You have been very helpful