How to Get More Out of Arc’s Boosts 2.0

Recently, the team behind the Arc browser announced Boosts 2.0, a new and improved way to “Paint the Internet” and make websites your own. While the feature makes it easier to customize websites with Arc, I found that limiting users to color and font changes with no full flexibility still makes it rather limiting.

Arc also supports custom CSS and JavaScript to insert custom functionality and theming into a website. However, if you’re a beginner, this can be overwhelming. I’ll walk through how to use the Code feature of Arc to do a bit more using some simple CSS. We’ll go over changing the background and text color, and where you can go to figure out how to do more.

Assuming you already have the Arc browser installed, I’d recommend opening up this page alongside this article. That way you can follow along with exactly what I am doing. I’m using one of my previous posts as a playground for this tutorial.

Concept 1: Selecting something to edit

First, locate the element on the page we want to style. The quickest way is to right-click and select “Inspect” from the menu that pops up.

A screenshot of the panel of options that opens when right-clicking on an element.

That should open a panel that looks like this:

Screenshot of Inspector panel inside of Arc browser for the blog post being used for the tutorial

This is where everything on a page gets generated. You can hover over any element to see where on the page it controls.

Once that’s visible, scroll down a bit and find the div element where the id equals “page.” It should look like this:

A focused area of the inspector. The highlight element is a div with an id of "page"

Great! we now have everything we need to start using CSS.

Concept 2: Simple colors

To start, let’s try some simple color changes inside of this div. Go ahead and open up the Boosts widget on the page. We’re going to want to navigate to the Code CSS button inside the widget. Once you’re there, you should have a blank editor, ready for us to write something.

Screenshot of the search bar in the Arc browser. The paintbrush indicating Arc Boosts is circled. It is the third icon from the right of the search field.

A screenshot of the Arc Boosts widget. The Code CSS button is located second from the bottom A screenshot of the blank code editor for Arc boosts

Now it’s time to insert some colors. The code below will set our background color to teal and our text to pink. (This is just to show that it can be done. I am aware the colors I’ve chosen look atrocious.)

  background: teal;
  color: hotpink;

After you’re done, your page should look something like this:

Screenshot of an Atomic Object blog post where the background is teal and the main text is hot pink

We can also set colors on multiple elements at the same time. Try the code below to set different colors on the page, article, and heading backgrounds.

  background: teal;
  color: hotpink;

article {
  background: lightblue;

.entry-header {
  background: greenyellow !important;

A screenshot of a blog post with very cacophanous colours set in the header, main content, and overall page.
Some quick tips:

  • CSS styles you apply to things like headers, divs, or any other HTML element are written without a period before them, such as article {}
  • CSS styles you apply to classes are written with a period, such as.entry-header
  • If you’re applying CSS styles to something with a specific attribute, such as an id, use square brackets, such as div[id="page"]
  • The !important directive makes sure the property gets applied. You don’t always need it, but it’s good to have it as a tool here.

Concept 3: Gradients and Images

Creating gradients between colors and inserting images is just as simple. Inside the same initial div, let’s try the code below:

  background-image: linear-gradient(45deg, red, pink, yellow, rgb(165, 255, 165));

Well isn’t that nice!

Now let’s say I want to insert an image instead. I’ve provided a link to an image of bread, but this will work with any image you can get a link to:

  background-image: url("");
  color: pink;

Screenshot of a blog post where the background is now an image of bread

Recap & Further Resources

You’ve now learned how to harness basic CSS to expand what you can do with Arc Boosts 2.0. For more CSS rules, functions, and tips, you can take a look at this reference from W3Schools. You’ll learn more about what you can do with your newfound capability.

Happy painting!


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