CSS property · data last changed 10 Nov 2026
color in email clients
Works in all 21.
caniemail (MIT) via @emailens/engine 0.18.22
No signup · Five clients free, Outlook Classic included · All 21 with an account
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All 21 clients
| Client | Support |
|---|---|
| Gmail | Works |
| Gmail Android | Works |
| Gmail iOS | Works |
| Outlook 365 | Works |
| Outlook (New) | Works |
| Outlook Classic | Works |
| Outlook iOS | Works |
| Outlook Android | Works |
| Outlook for Mac | Works |
| Apple Mail | Works |
| Apple Mail iOS | Works |
| Yahoo Mail | Works |
| Yahoo Mail Android | Works |
| Yahoo Mail iOS | Works |
| Samsung Mail | Works |
| Thunderbird | Works |
| HEY Mail | Works |
| Proton Mail | Works |
| AOL Mail | Works |
| Fastmail | Works |
| Superhuman | Works |
How color behaves
The color property controls the foreground (text) color of an element and is one of the most universally supported CSS declarations across email clients. While support is broad, the way clients interact with color in dark mode varies significantly, and brand colors can be unexpectedly inverted, desaturated, or replaced.
- Outlook Classic ignores named colors like rebeccapurple in some configurations and is most predictable when given hex values.
- Gmail and Yahoo aggressively repaint color in dark mode, which can flip dark text on light backgrounds into unreadable combinations.
- Apple Mail respects color values exactly but applies its own dark-mode color smoothing on iOS 13+.
Inline color on every text-bearing element. Pair color with an explicit background-color on table cells so dark-mode auto-inversion has a defined baseline. For links, set color directly on the anchor in addition to the parent <td> to defeat sanitizer rewrites.
Questions
Does color work in Outlook Classic?
Yes. Hex and rgb() values are reliable. Avoid CSS custom properties for color in Outlook Classic, use literal values inline.
Why does my color change in dark mode?
Gmail, Yahoo, and Apple Mail apply automatic color inversion in dark mode. Use the color-scheme meta tag and supply explicit dark-mode color pairs to opt out.
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