Developer reference

Header Dark Brand

Minimal dark header variation for launches, dark-theme emails, and premium announcement sends.

Headers blockProduction documentation pageSource file: header-black-e3.mjmlCopyable MJML and compiled HTML

All components See layouts Get Pro - £179

Tags: header · brand · dark · minimal

Rendering screenshot

Preview frame reflects current component rendering and real spacing proportions for production email QA.

Live preview

Rendered component preview

This preview is rendered from compiled HTML output so you can inspect the actual email structure, not a static mock-up.

Rendered email preview

Usage guidance

When to use this block

Use when a darker hero or CTA section follows immediately and the send should feel visually continuous.
Swap the placeholder mark for a real logo asset before exporting production HTML.

Developer notes

Edit MJML, ship HTML

Use MJML as the editable source of truth. The compiled HTML panel is included for ESP handoff, QA, or integration points that only accept raw HTML.

Also included in Template Hedgehog Pro for teams that want the full component archive offline.
Source file name: header-black-e3.mjml
4 client notes currently documented for this block.

Accessibility

Accessibility notes

Check contrast carefully between the dark background and any transparent logo asset you drop in.
Keep the header shallow so it does not become an obstacle for keyboard and screen-reader users.

Rendering notes

Client-specific guidance

Gmail (Web + Mobile): Primary spacing, stack order, and CTA rendering stay stable in Gmail web and mobile views.
Outlook Desktop (Windows): Dark logo rows are stable, though Outlook can tighten padding around the image wrapper.

Client support

Compatibility

4 clients

Rendering support notes across major email clients.

Header Dark Brand compatibility matrix
Client	Status	Notes
Gmail (Web + Mobile)	Tested	Primary spacing, stack order, and CTA rendering stay stable in Gmail web and mobile views.
Outlook Desktop (Windows)	Partial	Dark logo rows are stable, though Outlook can tighten padding around the image wrapper.
Apple Mail (macOS + iOS)	Tested	No additional notes.
Yahoo Mail	Tested	No additional notes.

Used in layouts

Where this block appears in production layout systems

These layout pages include this component in context, with block order, message structure, and QA guidance alongside the rendered email.

Security Alert System
Security notification
Alert users about critical account events with clear actions and support escalation paths.

Related blocks

Continue building

These components are closely related by category or usage pattern and are useful when assembling a full email flow.

Headers

Header

Simple top row with brand identity and a view-in-browser link for reliable email starts.

Headers

Header Blue Brand

Simple blue brand header for campaign sends that only need a logo lock-up at the top.

Headers

Header Centred

Simple centred brand header for newsletters and editorial sends.

Source code

Copy the code you need

The source and compiled HTML shown below map directly to the rendered preview above. This keeps preview, MJML, and HTML handoff output aligned.

Snippet assembly: place this block inside the same <mj-body> as your other snippets, then stack sections in send order.

MJML snippet

Component block only. Use this when assembling an email from multiple reusable sections inside a project that already includes the shared MJML classes.

<mj-wrapper padding="0" full-width="full-width" />
      <mj-section padding="28px 34px" />
      <mj-column padding="0" />
      <mj-image padding="0 0 14px 0" />
      <mj-text padding="0 0 12px 0" font-size="16px" line-height="28px" color="#1a1a1a" />
      <mj-button padding="0" font-size="16px" font-weight="700" border-radius="999px" inner-padding="14px 30px" />

      <mj-class name="h1" font-size="42px" line-height="46px" font-weight="800" />
      <mj-class name="h2" font-size="36px" line-height="40px" font-weight="800" />
      <mj-class name="h3" font-size="30px" line-height="34px" font-weight="800" />
      <mj-class name="h4" font-size="26px" line-height="30px" font-weight="800" />
      <mj-class name="h5" font-size="22px" line-height="26px" font-weight="800" />
      <mj-class name="h6" font-size="20px" line-height="24px" font-weight="800" />
      <mj-class name="h1-display" font-size="56px" line-height="60px" font-weight="800" />
      <mj-class name="body" font-family="'Inter', Arial, sans-serif" font-size="17px" line-height="28px" />
      <mj-class name="small" font-family="'Inter', Arial, sans-serif" font-size="14px" line-height="23px" />
      <mj-class name="label" font-family="'Inter', Arial, sans-serif" font-size="12px" font-weight="700" text-transform="uppercase" letter-spacing="0.12em" />
      <mj-class name="bold" font-weight="700" />
      <mj-class name="extrabold" font-weight="800" />
      <mj-class name="white" color="#ffffff" />
      <mj-class name="light" color="#94a3b8" />
      <mj-class name="medium" color="#4a5568" />
      <mj-class name="dark" color="#1a1a1a" />
      <mj-class name="text-primary" color="#1a1a1a" />
      <mj-class name="text-muted" color="#4a5568" />
      <mj-class name="thblue" color="#2f67ef" />
      <mj-class name="whitebg" background-color="#ffffff" />
      <mj-class name="superlightbg" background-color="#f8fafc" />
      <mj-class name="thbluebg" background-color="#2f67ef" />
      <mj-class name="blackbg" background-color="#0f172a" />
      <mj-class name="darkbg" background-color="#102447" />
      <mj-class name="rocketbluebg" background-color="#183b7a" />
      <mj-class name="e3bluebg" background-color="#183b7a" />
      <mj-class name="transbg" background-color="transparent" />
      <mj-class name="badge" font-family="'Inter', Arial, sans-serif" font-size="12px" line-height="16px" font-weight="700" letter-spacing="0.12em" text-transform="uppercase" />
      <mj-class name="button" font-weight="700" />
    </mj-attributes>
    <mj-style>
      .border-top-light { border-top: 1px solid rgba(26, 26, 26, 0.1) !important; }
      .border-bottom-light { border-bottom: 1px solid rgba(26, 26, 26, 0.1) !important; }
      .grayscale img { filter: grayscale(100%); }
    </mj-style>
    
    <mj-raw>
      <meta name="color-scheme" content="light dark" />
      <meta name="supported-color-schemes" content="light dark" />
      <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
      <link href="https://fonts.googleapis.com/css2?family=Manrope:wght@400;600;700;800&family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet" />
    </mj-raw>
  </mj-head>
  <mj-body background-color="#f3f4f6">
<mj-wrapper mj-class="blackbg">
   <mj-section>
     <mj-column>
       <mj-image src="/brand/hedgehog-mark-email.png" width="44px" padding="0" align="left" href="https://templatehedgehog.co.uk" alt="TemplateHedgehog icon" />
       <mj-text align="left" padding="8px 0 0 0" font-family="'Manrope', 'Inter', Arial, sans-serif" font-size="16px" font-weight="700" color="#ffffff">
         <a href="https://templatehedgehog.co.uk" style="color:#ffffff; text-decoration:none;">TemplateHedgehog</a>
       </mj-text>
     </mj-column>
   </mj-section>
 </mj-wrapper>

Compiled HTML snippet

Component-only compiled markup for block-level inspection and HTML assembly workflows.

<div style="display:none;font-size:1px;color:#ffffff;line-height:1px;max-height:0px;max-width:0px;opacity:0;overflow:hidden;">TemplateHedgehog reusable email block</div>
  
        <div
           aria-roledescription="email" role="article" lang="und" dir="auto" style="word-spacing:normal;background-color:#f3f4f6;"
        >
        
      <table
         align="center" border="0" cellpadding="0" cellspacing="0" role="presentation" style="background:#0f172a;background-color:#0f172a;width:100%;"
      >
        <tbody>
          <tr>
            <td>
              
        
      <!--[if mso | IE]><table align="center" border="0" cellpadding="0" cellspacing="0" class="" role="presentation" style="width:640px;" width="640" bgcolor="#0f172a" ><tr><td style="line-height:0px;font-size:0px;mso-line-height-rule:exactly;"><![endif]-->
    
        
      <div  style="margin:0px auto;max-width:640px;">
        
        <table
           align="center" border="0" cellpadding="0" cellspacing="0" role="presentation" style="width:100%;"
        >
          <tbody>
            <tr>
              <td
                 style="direction:ltr;font-size:0px;padding:0;text-align:center;"
              >
                <!--[if mso | IE]><table role="presentation" border="0" cellpadding="0" cellspacing="0"><tr><td class="" width="640px" ><table align="center" border="0" cellpadding="0" cellspacing="0" class="" role="presentation" style="width:640px;" width="640" ><tr><td style="line-height:0px;font-size:0px;mso-line-height-rule:exactly;"><![endif]-->
    
      
      <div  style="margin:0px auto;max-width:640px;">
        
        <table
           align="center" border="0" cellpadding="0" cellspacing="0" role="presentation" style="width:100%;"
        >
          <tbody>
            <tr>
              <td
                 style="direction:ltr;font-size:0px;padding:28px 34px;text-align:center;"
              >
                <!--[if mso | IE]><table role="presentation" border="0" cellpadding="0" cellspacing="0"><tr><td class="" style="vertical-align:top;width:572px;" ><![endif]-->
            
      <div
         class="mj-column-per-100 mj-outlook-group-fix" style="font-size:0px;text-align:left;direction:ltr;display:inline-block;vertical-align:top;width:100%;"
      >
        
      <table
         border="0" cellpadding="0" cellspacing="0" role="presentation" width="100%"
      >
        <tbody>
          <tr>
            <td  style="vertical-align:top;padding:0;">
              
      <table
         border="0" cellpadding="0" cellspacing="0" role="presentation" style="" width="100%"
      >
        <tbody>
          
              <tr>
                <td
                   align="left" style="font-size:0px;padding:0;word-break:break-word;"
                >
                  
      <table
         border="0" cellpadding="0" cellspacing="0" role="presentation" style="border-collapse:collapse;border-spacing:0px;"
      >
        <tbody>
          <tr>
            <td  style="width:44px;">
              
        <a
           href="https://templatehedgehog.co.uk" target="_blank"
        >
          
      <img
         alt="TemplateHedgehog icon" src="/brand/hedgehog-mark-email.png" style="border:0;display:block;outline:none;text-decoration:none;height:auto;width:100%;font-size:13px;" width="44" height="auto"
      />
    
        </a>
      
            </td>
          </tr>
        </tbody>
      </table>
    
                </td>
              </tr>
            
              <tr>
                <td
                   align="left" style="font-size:0px;padding:8px 0 0 0;word-break:break-word;"
                >
                  
      <div
         style="font-family:'Manrope', 'Inter', Arial, sans-serif;font-size:16px;font-weight:700;line-height:28px;text-align:left;color:#ffffff;"
      ><a href="https://templatehedgehog.co.uk" style="color:#ffffff; text-decoration:none;">TemplateHedgehog</a></div>
    
                </td>
              </tr>
            
        </tbody>
      </table>
    
            </td>
          </tr>
        </tbody>
      </table>
    
      </div>
    
          <!--[if mso | IE]></td></tr></table><![endif]-->
              </td>
            </tr>
          </tbody>
        </table>
        
      </div>
    
      
      <!--[if mso | IE]></td></tr></table></td></tr></table><![endif]-->
              </td>
            </tr>
          </tbody>
        </table>
        
      </div>
    
        
      <!--[if mso | IE]></td></tr></table><![endif]-->
    
      
            </td>
          </tr>
        </tbody>
      </table>
    
      </div>

Full library

Need the entire system available offline

Public component pages are there for reference and one-off use. Template Hedgehog Pro is for teams that want the full archive, local source files, compiled HTML, and a quicker implementation handoff.

Get Pro - £179 Read docs

Why teams upgrade

Stop collecting blocks one page at a time
Keep the full MJML and compiled HTML archive locally
Speed up implementation, review, and delivery across projects

Header Dark Brand

Rendered component preview

Compatibility

Where this block appears in production layout systems

Security notification

Continue building

Header

Header Blue Brand

Header Centred

Copy the code you need

MJML snippet

Compiled HTML snippet

Need the entire system available offline