# Design, branding, language and after-submit

> Theme your form (colors, font, radius, background image), set a workspace brand kit, choose the language, and control the thank-you or redirect.

_Building forms · forms.ax help · updated 2026-07-19 · https://forms.ax/help/building/customize_

## Ask your assistant

- "Make the form match my brand: logo from my site, primary color #0A6E4F, rounded corners, serif font."

All of it is a sentence away:

- **Brand kit** (workspace-wide): your logo, brand colors, font, corner radius and tone of voice — every form inherits it as its default design, existing and future, with no republish. Tip: ask your agent to read your website and set the kit from it.
- **Per-form theme**: any token the kit sets can be overridden on one form — background, surface and text colors, accent, button colors, corner radius, font (seven fast system stacks), density, alignment, a full-page background image with a readability scrim, and logo size. Everything is validated and mobile-safe by construction.
- **Design Mode layout**: images, text, video and dividers between questions, and 2–3 fields side by side in columns that always collapse on phones. A welcome screen (title, message, hero image, Start button) opens the form.
- **Custom CSS** (Pro): an escape hatch for the last few percent, appended after the built-in styles.
- **Language**: respondent-facing UI chrome in English or Swedish (`en`/`sv`). Your questions are always your own words.
- **After submit**: a custom thank-you message, or a redirect to any URL — handy for firing conversion events on [your own thank-you page](/help/building/embed).

Theme and settings changes need a republish to go live; brand kit changes apply to live forms immediately.

## FAQ

**Can I remove the forms.ax badge?**
Yes, on paid plans — see limits and plans.

**Why was my color rejected?**
Every theme is checked for WCAG AA contrast before it saves. If a combination would be unreadable, you get the measured ratio and a fix suggestion instead of an unreadable form.

Related: [update_form](https://forms.ax/help/tools/update_form) · [set_brand_kit](https://forms.ax/help/tools/set_brand_kit) · [get_brand_kit](https://forms.ax/help/tools/get_brand_kit) · [set_layout](https://forms.ax/help/tools/set_layout)