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Salesforce Cosmos Theme and SLDS 2 Availability
Salesforce Cosmos is the first theme available in Salesforce Lightning Design System 2 (SLDS 2). Salesforce Cosmos was released as beta in Winter ’25 with the temporary name Enhanced Lightning User Interface (UI). It's a new design that makes Salesforce simpler to use with circular patterns, easy-to-understand icons, new colors, and better typography. Salesforce Cosmos is the default theme of Salesforce Lightning Design System 2.
| Available in: Lightning Experience |
| Availability varies by edition |
SLDS 2
SLDS 2 is the latest design system for Lightning Platform products. It combines the Salesforce Cosmos theme with an enhanced design architecture and updated tools. SLDS 2 provides customization options for admins, developers, and designers to bring brands to life.
Benefits of SLDS 2 For Admins
As an admin, SLDS 2 provides themes and branding features to customize your users’ experience.
- Access no-code customization themes in Setup in Themes and Branding
- Enable the Salesforce Cosmos theme or create your own custom theme
To get started, follow the steps in Brand Your Org in Lightning Experience.
SLDS 2 Benefits For Developers and Designers
SLDS 2 offers your team of developers and designers more granular control over your org’s user interface (UI).
- Build custom experiences with Lightning base components
- Future-proof your Salesforce org with global styling hooks
- Design and build with updated developer tools, pattern libraries, and style guidelines
- Create consistent, accessible UI features and flows
To get started, read Explore the Salesforce Cosmos theme.
SLDS 2 Features
In addition to Salesforce Cosmos in Themes and Branding, SLDS 2 includes different features. Refer to this table to learn more about individual features within SLDS 2.
| SLDS 2 Feature | Description |
|---|---|
| Themes and Branding | Pre-built themes plus the ability to build your own, all grounded in an expanded color palette, give you more granular customization options. |
| Salesforce Cosmos theme | Available within Themes and Branding, Salesforce Cosmos is a modern, intuitive visual design with circular motifs, refreshed colors, and improved typography. |
| Advanced Figma kits | SLDS 2 Figma kits guide your developers and designers on the use of pre-built components with refreshed styling and 1:1 code mapping. |
| Developer tools | New rule sets, inline guidance, and bulk reporting tools offer developers greater control, specificity, and efficiency. |
| Dark mode (beta) | As of Winter ’26, admins can enable dark mode for any SLDS 2 theme, giving their users the ability to toggle between light and dark modes. Currently, dark mode is available in Free Suite, Starter Suite, Pro Suite, Professional, Enterprise, and Developer edition orgs only. Not all Salesforce apps and features are fully optimized for dark mode yet, including:
|
| Display density, including comfy and compact modes | Spacing and layout controls of interface elements within a given screen area lead to greater personalization of your UI. |
| SLDS 2 architecture |
|
| Visualforce pages | Visualforce pages are the top-level container for custom apps built with Visualforce. As of Winter ’26, SLDS 2 is available on Visualforce pages. |
SLDS 2 and Salesforce Cosmos Availability by Salesforce Product and Feature
As of Winter ’26, SLDS 2 features are generally available (GA) in all Salesforce editions. SLDS 2 and Salesforce Cosmos are available for all new orgs and are turned on by default for these editions. They are also available for all existing orgs as an opt-in through Themes and Branding for the same editions.
- Developer
- Enterprise
- Pro Suite
- Professional
- Starter Suite
- Unlimited
Products Not Currently Supported to Use SLDS 2
Currently, we don't have plans to support Salesforce Cosmos or SLDS 2 in some Salesforce products and add-ons.
- Salesforce mobile app
- Builders, such as Flow Builder and Lightning App Builder
- Lightning Out
- Experience Cloud
SLDS 2 Limitations
Although SLDS 2 is generally available, some of its features are available as beta features.
- The default Salesforce Cosmos theme and SLDS 2 are generally available (GA), but some related features are beta or are available in a limited capacity, like dark mode. Beta features can have limitations, which can impact user experiences.
- Enabling Salesforce Cosmos doesn’t automatically enable SLDS 2 features, such as dark mode. Specific SLDS 2 features are enabled separately.
- Some Salesforce products are built on platforms other than Lightning. If Salesforce Cosmos isn't available, users continue to see the default UI that they’re used to.
