CSS Properties

background-clip

CSS property · 13 supported, 2 partial, 6 unsupported across 21 clients

background-clip controls the area of an element to which the background extends , border-box, padding-box, content-box, or text. Email support is limited: only Apple Mail and a few WebKit-based clients honor background-clip: text reliably, making it an effects-only property best used as progressive enhancement.

Client Support

Client	Category	Engine	Support
Gmail	webmail	Gmail Web	Supported
Gmail Android	mobile	Gmail Mobile	Partial
Gmail iOS	mobile	Gmail Mobile	Partial
Outlook 365	webmail	Outlook Web	Supported
Outlook (New)	desktop	Outlook Web	Unsupported
Outlook Classic	desktop	Microsoft Word	Unsupported
Outlook iOS	mobile	Outlook Mobile	Supported
Outlook Android	mobile	Outlook Mobile	Supported
Outlook for Mac	desktop	WebKit	Supported
Apple Mail	desktop	WebKit	Supported
Apple Mail iOS	mobile	WebKit	Supported
Yahoo Mail	webmail	Yahoo	Unsupported
Yahoo Mail Android	mobile	Yahoo	Unsupported
Yahoo Mail iOS	mobile	Yahoo	Unsupported
Samsung Mail	mobile	Samsung	Supported
Thunderbird	desktop	Gecko	Supported
HEY Mail	webmail	WebKit	Supported
Proton Mail	webmail	Proton	Supported
AOL Mail	webmail	AOL	Unsupported
Fastmail	webmail	Fastmail	Supported
Superhuman	desktop	Blink	Supported

Client-by-client behaviour for background-clip

Fully supports background-clip (13): Gmail, Outlook 365, Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail, Superhuman.

Partial support (2): Gmail Android, Gmail iOS. Expect rendering quirks unique to each engine. Partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.

No support (6): Outlook (New), Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail. Plan fallbacks for these clients before relying on background-clip in production sends.

When to use background-clip in email

Gradient text headlines on Apple-Mail-heavy audiences (premium, design-tool, agency newsletters).
Decorative section dividers that fade their background.
Hero text overlay effects where the gradient appears only behind text glyphs.

Rendering behaviour and edge cases

background-clip: text requires -webkit-background-clip: text and color: transparent , both must be inline on the same element.
Outlook and Gmail ignore background-clip and render with whatever color you set, so always pair with a solid color fallback.
Layered background-clip stacks (e.g., padding-box + content-box) are unreliable and rarely worth the implementation cost.

Recommended fallback strategy

Set a sensible solid color fallback first, then layer background-clip: text as a progressive enhancement. Wrap critical headlines in spans with both -webkit-background-clip: text and a fallback color so non-supporting clients still display readable text.