CSS property · data last changed 10 Nov 2026
accent-color in email clients
Works in 5 of 21. Not supported in Gmail, Gmail Android, Gmail iOS and 12 more. Untested in Thunderbird.
Your reader in Outlook Classic sees the email without accent-color, even if it looks right where you tested it.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
Do not rely on form-element styling in email. If interactivity is needed, design around button-style anchor tags that link out to a hosted experience, and reserve accent-color for clients that explicitly render forms.
There is no drop-in fix for accent-color in Outlook Classic. Design so the email still reads without it.
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accent-color is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Gmail | Not supported |
| Gmail Android | Not supported |
| Gmail iOS | Not supported |
| Outlook 365 | Not supported |
| Outlook (New) | Not supported |
| Outlook Classic | Not supported |
| Outlook iOS | Not supported |
| Outlook Android | Not supported |
| Outlook for Mac | Not supported |
| Yahoo Mail | Not supported |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| Proton Mail | Not supported |
| AOL Mail | Not supported |
| Fastmail | Not supported |
| Thunderbird | Untested |
Works in 5: Apple Mail, Apple Mail iOS, Samsung Mail and 2 more. Show all
| Client | Support |
|---|---|
| Apple Mail | Works |
| Apple Mail iOS | Works See caveat 1 |
| Samsung Mail | Works See caveat 1 |
| HEY Mail | Works |
| Superhuman | Works |
Caveats (1)
- 1. Apple Mail iOS, Samsung Mail: Supports
accent-colorbut rendering depends on browser support.
Caveats as recorded by caniemail (MIT), one entry per wording.
How accent-color behaves
accent-color applies a custom tint to native form controls (checkboxes, radio buttons, range sliders). Email forms are largely stripped or ignored by clients for security reasons, so accent-color is mostly a no-op in production email, but it is harmless to include for the few clients that render forms.
- Most major clients strip <input> elements entirely, making accent-color irrelevant.
- Gmail's AMP for Email path supports limited form interaction but does not honor accent-color.
- accent-color is safe to include as a future-proofing declaration without breaking layout in clients that ignore it.
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