> For the complete documentation index, see [llms.txt](https://docs.1kosmos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.1kosmos.com/identity-verification/ux-and-design/branding-customization.md).
# Branding Customization
1Kosmos can be styled to reflect your brand so that, to your customers, it feels like a seamless extension of your own product. This page covers everything you can customize and how to apply it.
***
### What you can customize
| Element | Customizable | Notes |
| --------------------------------- | ------------ | ---------------------------------------------- |
| Logo | ✅ | Light and dark variants |
| Primary color | ✅ | Used for primary buttons, links, active states |
| Secondary color | ✅ | Used for secondary actions, accents |
| Text / content color | ✅ | Body and heading text |
| Background color | ✅ | — |
| Typography / fonts | ✅ | — |
| Content & copy (labels, messages) | ✅ | — |
### Logo
Upload your logo to replace the default 1Kosmos branding across the interface.
**Recommended specifications:**
* **Formats:** SVG (preferred for crispness at any size), PNG with transparent background
* **Dimensions:** recommended max height 40px in the header
* **File size:** under 1 MB
### Colors
Set your brand palette to carry your identity through every screen.
* **Primary color** — Your main brand color. Applied to: primary buttons, links, selected states, progress indicators.
* **Secondary color** — A complementary color for :secondary buttons, highlights.
* **Text color** — The color of body and heading text.
{% hint style="info" %}
Custom colors must maintain sufficient contrast against their backgrounds (WCAG 2.2 AA requires a contrast ratio of at least **4.5:1** for normal text and **3:1** for large text and UI components.
{% endhint %}
### Content & text
Beyond visual styling, you can tailor the words your customers see.
* **Custom labels and copy**
* **Custom links**
* **Email / notification templates**
### Best practices
* Provide both light and dark logo variants for a polished result in every theme.
* Test your palette against the built-in contrast checker before publishing.
* Keep copy concise and consistent with the rest of your product's voice.
* Preview changes before publishing to all users.
---
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