<style> element

An HTML element to contain style information, in CSS, for a document or part of a document.

Estimated Support About

66.67% + 21.21% = 87.88%

Apple Mail

macOS

10.3

iOS

10.3
12.3

Gmail

Desktop Webmail

2019-06
1

iOS

2019-06
1 2

Android

2019-06
1 2

Mobile Webmail

2020-02

Outlook

Windows

2003
2007
4
2010
4
2013
4
2016
4
2019
4

Windows Mail

2020-01
4

macOS

2011
2016

Outlook.com

2019-06

iOS

2019-06

Android

2019-06

Yahoo! Mail

Desktop Webmail

2019-06
5

iOS

2019-06

Android

2019-06
3

AOL

Desktop Webmail

2020-01

iOS

2020-01

Android

2020-01

Samsung Email

Android

5.0.10.2
6.0

Mozilla Thunderbird

macOS

60.3

ProtonMail

Desktop Webmail

2020-03
2022-02

iOS

2020-03

Android

2020-03
1

Fastmail

Desktop Webmail

2021-07

HEY

Desktop Webmail

2020-06

Orange

Desktop Webmail

2019-06
2021-03

iOS

2019-06

Android

2019-06
2019-08

LaPoste.net

Desktop Webmail

2021-08

SFR

Desktop Webmail

2019-06

iOS

2019-06

Android

2019-06

GMX

Mail.ru

Desktop Webmail

2020-09

Notes

  • 1

    Partial. Not supported inside the <body>.

  • 2

    Partial. Not supported with Non Gmail Accounts.

  • 3

    Buggy. The first <head> in the HTML is removed, so <style> elements need to be in a second <head> element.

  • 4

    Buggy. <style> elements need to be declared before their rules are used.

  • 5

    A CSS rule following a CSS comment is ignored. (See email-bugs#25.)

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Test it yourself

This feature was last tested on June 24, 2019.

If you want to test this feature in the same conditions as we did, you can get our test code and run a test by yourself. Make sure to follow our testing recommendations first.

View the test code