Guide to crafting a flawless pixel-perfect separator with CSS borders

I have a menu with a black background and a submenu with a grey background.

Now, I want to add a pixel-perfect divider between them.

However, I'm unsure of which border color to use in order to achieve this perfection. Can anyone provide some guidance?

Below is the HTML code snippet:

<!DOCTYPE html>
<html>
<body>
<div class="mainnav">
    <p>This is the main navigation</p>
</div>
<div class="subnav">
     <p>This is the sub navigation</p>
</div> 
</body>
</html>

And here is the corresponding CSS:

.mainnav {
    width: 100%;
    height: 60px;
    background-color: #000000;
    color: #ffffff;
    text-align: center;
}
.mainnav p {
    padding-top: 20px; 
}
.subnav p {
    padding-top: 10px; 
}
.subnav {
    width: 100%;
    height: 45px;
    background-color: #333;
    color: #ffffff;
    text-align: center;
}

If you'd like to view the interactive example, please visit my jsfiddle link here:

http://jsfiddle.net/ruUgk/

Thank you for your assistance.

Answer №1

Include a border at the bottom of the navigation bar with the class .mainnav

.mainnav {
    border-bottom:1px solid #000;
}

http://jsfiddle.net/abcd123/

Answer №2

There is no need for a pixel-perfect divider in my opinion! The current design looks fine. This platform is more suited for technical inquiries rather than questions about aesthetics.

Answer №3

I plan to include a dashed line separating the two sections

Include the following code in the main navigation CSS

border-bottom:1px dashed #000;

You can view the result on CodePen

https://codepen.io/example/123/

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