CSS Rounded Corners the Hupspot Way

Designers who admire the clean, modern look of Hubspot pages often want to recreate those smooth, rounded cards and buttons. In this guide, you will learn how to build similar rounded corners using CSS so your layouts feel polished, consistent, and easy to scan.

We will walk through the border-radius property, show real code examples, and explain how to control each corner, build circles, and create responsive components.

Why Rounded Corners Matter in Hubspot-Inspired Design

Rounded corners are more than a cosmetic tweak. When you study interfaces like Hubspot, you see rounded shapes used to:

• Improve readability by softening hard visual edges.
• Direct attention toward key content areas.
• Make CTAs, cards, and forms look approachable and modern.
• Create a unified design language across an entire site.

All of this is powered by one CSS property: border-radius. Mastering it lets you shape containers in a way that matches the clean style seen on Hubspot blogs and landing pages.

Core CSS Syntax for Rounded Corners

The basic syntax of border-radius is straightforward:

.box {
  border-radius: 10px;
}

This rule applies a 10-pixel radius to all four corners of the selected element. You can use several types of values:

• Length units: px, em, rem (for fixed or scalable radii).
• Percentages: Useful for circles and pill shapes.

On layouts reminiscent of Hubspot templates, designers typically rely on pixel values for cards and percentage values for circular avatars or pill buttons.

Single Radius vs. Multiple Radii in Hubspot-Themed Layouts

To shape elements the way you might see in a Hubspot layout, it helps to know when to use one value and when to use four.

Using One Value for All Corners

Applying a single radius gives a consistent curve on every corner:

.card {
  border-radius: 8px;
}

This is ideal for unified card grids, feature blocks, or blog preview tiles where you want every edge to match.

Using Two Values for Paired Corners

You can pass two values to control opposite pairs of corners:

.banner {
  border-radius: 20px 0;
}

This pattern gives the top-left and bottom-right corners a 20-pixel radius, while the other two corners stay square. It is useful for subtle visual accents on banners or hero sections.

Using Four Values for Full Corner Control

For full flexibility that mirrors more advanced modules in tools similar to Hubspot, use four values:

.panel {
  border-radius: 20px 0 20px 0;
}

The order of values is:

1. Top-left
2. Top-right
3. Bottom-right
4. Bottom-left

This lets you create diagonal patterns or asymmetrical containers for standout sections.

Hubspot-Style Circles and Pills with Border-Radius

Circle avatars and pill buttons are common on modern marketing and CRM sites, including layouts like those used by Hubspot. Here is how to create them.

Perfect Circle Using Border-Radius

To build a perfect circle, set equal width and height and use border-radius: 50%;:

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
}

The overflow: hidden; line ensures that any child image does not spill outside the curved edge.

Pill-Shaped Buttons for a Hubspot-Inspired UI

Pill buttons feel friendly and draw the eye, much like CTAs on Hubspot articles:

.btn-pill {
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
}

A very large radius (often 9999px) ensures the left and right ends are fully rounded, regardless of text length.

Advanced Hubspot Techniques: Individual Corner Properties

For deeper control, you can target each corner with its own property. This is particularly helpful when mimicking layered cards or overlapping modules similar to those on Hubspot resource pages.

.feature-card {
  border-top-left-radius: 24px;
  border-top-right-radius: 24px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}

This styling creates a card with rounded top edges and flat bottom edges, useful for stacked segments or pricing tables.

Combining Percentages and Fixed Units

You can also mix units for interesting effects:

.highlight {
  border-top-left-radius: 40px;
  border-top-right-radius: 40px;
  border-bottom-right-radius: 20%;
  border-bottom-left-radius: 20%;
}

This can generate more organic shapes that stand out on landing pages, while still aligning with a professional Hubspot-inspired aesthetic.

Responsive Rounded Corners in a Hubspot-Like System

As screen sizes change, you may want your radii to adapt as well. Many design systems modeled on tools like Hubspot rely on CSS variables and media queries.

Using CSS Variables for Design Consistency

:root {
  --radius-small: 4px;
  --radius-medium: 8px;
  --radius-large: 16px;
}

.card {
  border-radius: var(--radius-medium);
}

By using variables, you keep rounded corners consistent across cards, forms, and callouts, and you can update them from one central place.

Adapting Radius with Media Queries

You might want softer corners on mobile and sharper ones on desktop:

.module {
  border-radius: 12px;
}

@media (min-width: 1024px) {
  .module {
    border-radius: 6px;
  }
}

This approach lets you fine-tune the feel of your layout at different breakpoints, similar to the responsive behavior seen on sites like Hubspot.

Practical Example: Hubspot-Style Content Card

Below is a simple content card example that echoes the polished style you might expect from a Hubspot blog card.

.content-card {
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  padding: 1.5rem;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.content-card img {
  border-top-left-radius: 12px;
  border-top-right-radius: 12px;
}

You can pair this with a simple HTML structure:

<article class="content-card">
  <img src="image.jpg" alt="Article thumbnail" />
  <h2>Article Title</h2>
  <p>Short description of the article.</p>
</article>

The combination of container and image radii ensures a seamless top edge with rounded corners and a clean rectangular body.

Testing and Debugging Rounded Corners

Rounded corners may not appear correctly if other styles conflict. To debug layouts inspired by Hubspot, check for:

• Overflow issues: Use overflow: hidden; when content spills outside the radius.
• Background clipping: Apply background-clip: padding-box; if borders affect how the background behaves.
• Vendor prefixes: Modern browsers rarely need them, but legacy code may include properties like -webkit-border-radius.

Learning More About CSS Rounded Corners

For a deeper dive into rounded corners and additional examples, you can study the original tutorial on the Hubspot blog here: CSS rounded corners tutorial.

If you are building a growth-focused site and want expert help aligning design, SEO, and analytics with a style similar to Hubspot, you can also explore consulting services at Consultevo.

By mastering border-radius and the techniques above, you will be able to create modern, user-friendly interfaces that feel as refined and trustworthy as the best examples in today’s marketing ecosystem.