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Brand colors are available on every plan, including Startup. Other custom branding — your own logo and favicon, the banner, social profiles, and removing Cal ID branding — needs the Business or Enterprise plan. See Subscription and pricing.
Set primary colors for your personal booking page so it matches your company’s visual identity. You can define different colors for light and dark themes so the page looks right regardless of the booker’s system settings. Set them under Settings → Custom Branding.

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Step-by-step setup

1

Log in to Cal ID

Sign in to your account.
2

Navigate to Settings

Click the Settings icon in the sidebar.
3

Go to Custom Branding

Select the Custom Branding tab.
4

Enable the feature

Scroll to Custom brand colors and switch the section toggle to ON.
Custom Branding tab scrolled to the Custom brand colors section with its toggle switched on

Switching away from Cal ID defaults

5

Set the light theme color

Click on the Brand color (light theme) field, then enter your brand’s Hex code or use the color picker to select the primary color for light mode.
Brand color (light theme) field with a hex code entered and the color picker swatch open beside it

Matching your brand in light mode

6

Set the dark theme color

Click on the Brand color (dark theme) field, then select the color that will represent your brand when a booker views your page in dark mode.
Brand color (dark theme) field with a hex code entered and the color picker open beside it

Keeping contrast right in dark mode

7

Save your changes

Click the blue Update button at the bottom of the section to apply these colors to your booking page.
Choose colors that remain readable in their respective themes — for example, a darker shade for light mode and a slightly brighter or more vibrant shade for dark mode.

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What this changes on your page

Once saved, your custom colors will override the default Cal ID branding in several key areas:
  • Buttons: Your primary action buttons (like “Confirm”) will use your selected brand color.
  • Highlights: Selected dates and active time slots in the calendar will be highlighted in your brand color.
  • Navigation elements: Progress bars and specific icons will adopt your custom color scheme.
Booking page in light mode with the selected date, active time slots, and Confirm button rendered in the custom brand color

How bookers see your colors

Booking page in dark mode with time slots and buttons rendered in the dark theme brand color

The same page after dark mode

To ensure accessibility, avoid using very pale colors (like white or light yellow) as your primary brand color, as they can be difficult to read on light backgrounds. Aim for a contrast ratio that keeps your buttons legible for everyone.

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More color and branding options

Team brand colors

Apply the same color controls to a team’s booking page.

Custom Branding overview

Add a banner, social profiles, and a logo to complete your page.

Related topics

Managing Custom Brand Colors in Cal ID for TeamCustom Branding for PersonalCustomize Your Brand Logo and Favicon in Cal IDCustomizing Your Appearance in Cal ID