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htmlcssemailoutlookhtml-email

Override Outlook dark mode button background

I am trying to add support for dark mode to my email templates, however am having an issue when it comes to Outlook. For some reason Outlook is partially overriding the background of my button which is causing it to display incorrectly:

enter image description here

The HTML for the button is as follows:

<td align="center" style="word-break: break-word; font-family: &quot;Nunito Sans&quot;, Helvetica, Arial, sans-serif; font-size: 16px;">
  <a href="{{action_url}}" class="f-fallback button" target="_blank" style="color: #fff; border-color: #13c2c2; border-style: solid; border-width: 10px 18px; background-color: #13c2c2 !important; background-image: linear-gradient(#13c2c2, #13c2c2) !important; display: inline-block; text-decoration: none; border-radius: 3px; box-shadow: 0 2px 3px rgba(0, 0, 0, 0.16); -webkit-text-size-adjust: none; box-sizing: border-box;">Reset your password</a>
</td>

The button has the following inline style (formatted for your convenince):

color: #fff;
border-color: #13c2c2;
border-style: solid;
border-width: 10px 18px;
background-color: #13c2c2 !important;
background-image: linear-gradient(#13c2c2, #13c2c2) !important;
display: inline-block;
text-decoration: none;
border-radius: 3px;
box-shadow: 0 2px 3px rgba(0, 0, 0, 0.16);
-webkit-text-size-adjust: none;
box-sizing: border-box;

Additionally, I've already added the following to the <head> section of my email.

<meta name="color-scheme" content="light dark" />
<meta name="supported-color-schemes" content="light dark" />

Thanks!

Solution

  • The bad news is that we cannot specifically target Dark Mode via CSS in email via @media query or generated class name for Gmail or Outlook. Gmail replaces color values in the sheet and Outlook will inline Dark Mode color values and adds an !important to them and makes it impossible to override it in the sheet.

    Solution

    Until Google and Microsoft offer a solution, the best approach forward is to accept this is a reality and design emails that work no matter what the background color the user chooses to view them. More users are adopting Dark Mode, so it's only going to become more popular going forward.

    Good luck.