Klarna Buttons Styling

Customize the Klarna Express checkout buttons for the integration with flexible themes and shapes. Use the provided code snippets to implement styles quickly and easily.

6 min read

Where to find the button

The Express checkout button can be displayed on the product, cart, or checkout page, offering returning Klarna users a one-click experience that reduces friction and captures impulse purchases by streamlining the route to purchase and boosting conversion. Express checkout can make checkout 5x faster than normal.


Klarna button in product detail page	Klarna button in cart	Klarna button in checkout

Theme

The theme defines the button's color. The theme can be changed by setting the value of the theme attribute.

Apart from the default dark theme, the light theme can be applied to display the button in white, or the outlined theme to render the white button with an outline.

Default theme (dark)

The button's default theme color is dark. As the theme attribute is optional, the default theme is applied both when the attribute is set to default and when it is omitted from the source code altogether. Avoid using the default theme on black or dark backgrounds. The button must be used on backgrounds that provide sufficient contrast.

The default theme is recommended because it is widely recognized by Klarna customers and looks good on light backgrounds.

An image showing the Express checkout button in the default dark theme with a black background.

JAVASCRIPT

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klarna.Payment.button({
    theme: "default", // Used to set the theme of the button
    ...
}).mount('#container')

Sample code to render the default Express checkout button.

Light theme

Use the light theme to make the button visible on dark backgrounds. To apply the light theme, set the theme attribute to light. Avoid using the light theme on white or light backgrounds. The button must be used on backgrounds that provide sufficient contrast.

JAVASCRIPT

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klarna.Payment.button({
    theme: "light", // Used to set the theme of the button to light
    ...
}).mount('#container')

Sample code to render a white Express checkout button.

Outlined theme

Use the outlined theme to make the button visible on all backgrounds. To apply this theme, set the theme attribute to outlined. Avoid placing the button on dark or saturated backgrounds. The button must be used on backgrounds that provide sufficient contrast.

JAVASCRIPT

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klarna.Payment.button({
    theme: "outlined", // Used to set the theme of the button
    ...
}).mount('#container')

Sample code to render a white, outlined Express checkout button.

Button shape

Customizing the shape of the button to match the site's look and feel is a key step in creating a visually cohesive and engaging user experience. To control the button's shape, change the value of the shape attribute.

There are three shapes available with the Express checkout button: default, rectangular, and pill.

Rounded corners (default)

The default button shape is a rectangle with rounded corners. To apply the default shape, set the shape attribute of the element to default.

An image showing the Express checkout button in the default rectangular shape with rounded corners.

JAVASCRIPT

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klarna.Payment.button({
    shape: "default", // Used to define the shape of the button
    ...
}).mount('#container')

Sample code to render the Express checkout button in the default shape.

Minimum corner radius

To apply the rectangular shape with square corners, set the shape attribute of the element to rect.

JAVASCRIPT

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klarna.Payment.button({
    shape: "rect", // Used to style the button with a rectangular shape with square corners
    ...
}).mount('#container')

Sample code to render the Express checkout button in the rectangle shape with square corners.

Maximum corner radius

To apply the pill shape, set the shape attribute of the element to pill.

An image showing the Express checkout button in the pill shape.

JAVASCRIPT

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klarna.Payment.button({
    shape: "pill", // Used to style the button in a pill shape
    ...
}).mount('#container')

Sample code to render the Express checkout button in the pill shape.

Button size

Width

Display the Klarna button prominently. Make the button the same width as other payment buttons in stacked button layouts.

When the width of the button is below 160px or the copy does not fit in the button, the text is removed and only the Klarna wordmark is shown.

Height

The default recommended height of the Klarna button is 48px and the minimum height allowed is 40px. Ensure the button has the same height as other payment buttons.

Button Klarna branding

There are three ways to display the Klarna trademark on the button: badge, left icon, or centered icon. These variants are available to ensure there is a button variant aligned with the Partner's UI patterns. To control the button's alignment, change the value of the logoAlignment attribute.

Default

The default alignment is the Klarna badge centered with text before. To apply the default shape, set the logAlignment attribute of the Identity.button() function to default.

JAVASCRIPT

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klarna.Payment.button({
    logoAlignment: "default",
    ...
}).mount('#container')

Left icon alignment

To use the Klarna icon aligned to the left of the button, set the logoAlignment attribute of the Identity.button() function to left.

JAVASCRIPT

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klarna.Payment.button({
    logoAlignment: "left",
    ...
}).mount('#container')

Centered icon alignment

To position the Klarna icon at the center with the text trailing, set the logoAlignment attribute of the Identity.button() function to center.

JAVASCRIPT

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klarna.Payment.button({
    logoAlignment: "center",
    ...
}).mount('#container')

Express checkout integration

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