Email Design Trends 2025: HTML Patterns That Actually Work in Outlook and Gmail

In 2025, the gap between email designs that look great in Figma and ones that actually render correctly across clients is wider than ever. Dark mode is standard, mobile opens now exceed 50%, and Outlook still has a 20%+ enterprise share — meaning bulletproof HTML is non-negotiable.

Here are the 9 email design trends that matter this year, with the HTML patterns behind each one.

1. Dark Mode by Default

Dark mode support is no longer optional. Apple Mail, Gmail (mobile), and Outlook all support dark themes — and roughly 35% of recipients use dark mode for email.

What fails in dark mode:

White backgrounds that flash before rendering
Dark text on transparent image layers
Logo PNGs with white backgrounds

What works:

Transparent SVG or PNG logos
@media (prefers-color-scheme: dark) for targeted overrides
Testing with both forced dark mode (Outlook) and adaptive dark mode (Apple Mail)

In Figma: Use separate light and dark frames. Marka Email Generator exports dark mode-compatible CSS automatically when you use the dark mode layer structure.

2. Modular Email Design Systems

The fastest-moving email teams in 2025 treat email templates like component libraries — not one-off designs. A modular system means:

One master header, footer, and CTA component
Campaign-specific hero and body blocks
Reusable layouts that can be mixed and matched

Benefits for HTML output:

Each module is independently exportable
Changes to a component propagate across all campaigns
Code stays lean because repeated blocks share the same HTML structure

In Figma: Build your email system with Figma components and use Marka to export individual blocks or full templates. The plugin preserves your component hierarchy in the output.

3. Minimal, Performance-First Design

Inbox providers — especially Gmail — clip emails over 102KB. Heavy templates with many images hurt deliverability and load time.

2025 best practices:

Target 20–50KB HTML output (pre-images)
Use system fonts or a single web font with a safe fallback stack
Replace decorative dividers and spacer images with CSS borders and padding
Compress all images before linking; use 2x resolution only for logos

Marka Plugin output averages 20–40KB with minification enabled — significantly below the 102KB Gmail clip threshold.

4. True Mobile-First Layouts

Mobile email opens consistently exceed desktop in consumer inboxes. The shift to mobile-first design means:

Layout changes:

Single-column by default, two-column only where it adds clarity
Minimum 44px tap targets for buttons
16px+ body text (anything smaller renders poorly on iOS)
Full-width CTAs, not centered narrow buttons

HTML approach:

Table-based single-column structure as the base
@media queries to expand content on desktop where appropriate
Fluid images with max-width: 100% and height: auto

5. Typography-Driven Layouts

With image blocking still common in corporate email clients, typography is the primary design signal. 2025 trends in email typography:

Large, bold headlines (40–60px) as the visual anchor
Tight letter-spacing on headers
High-contrast body text (avoid light grey on white)
Serif fonts as brand differentiators where web font support exists

Outlook note: Outlook ignores font-family on elements that use mso-generic-font-family. Always set a system font fallback.

6. Accessible Email Design

Email accessibility is both an ethical requirement and a deliverability signal. Key patterns:

HTML checklist:

role="presentation" on all layout tables
alt text on every <img> (empty alt="" for decorative images)
Minimum 4.5:1 contrast ratio for body text
Real text links, not text embedded in images
lang attribute on the <html> element

Accessible emails also tend to perform better — screen reader users who can navigate your email are more likely to convert.

7. Interactive Elements (Where Supported)

CSS-only interactivity in email has expanded. In 2025, supported techniques include:

Hover states on buttons and cards (Apple Mail, Gmail web)
CSS animations for subtle motion (Apple Mail, iOS Mail)
Accordion/tab patterns using checkbox hack (limited support)

Reality check: None of these work in Outlook. Always design the non-interactive fallback first, then layer interactivity on top with @media and @supports checks.

8. Personalization with ESP Variables

Generic emails underperform. First-name personalization is table stakes — the trend in 2025 is deeper dynamic content:

Product recommendations based on purchase history
Location-based content blocks
Conditional sections (show/hide based on contact properties)

In Figma: Add ESP variables directly into text layers — HubSpot tokens, Klaviyo conditional tags, Mailchimp merge tags, etc. Marka preserves these exactly in the exported HTML, so your personalization logic survives the export step.

9. Outlook-Safe HTML as the Foundation

Outlook (Microsoft 365 + desktop) is used by 20–30% of enterprise recipients. Designs that break in Outlook lose a significant audience segment.

Patterns that fail in Outlook:

display: flex and CSS Grid
border-radius on table cells
background-image on <div> elements
Negative margins and transforms

Patterns that work everywhere:

Table-based layouts with cellpadding and cellspacing
mso- prefixed conditional comments for Outlook-specific fixes
VML for background images in Outlook
Inline styles on every element

Marka Email Generator outputs table-based HTML with Outlook conditional comments built in — so the foundation is solid before you start customizing.

Building These Trends in Figma

All 9 trends above can be implemented in Figma using standard tools — Auto Layout for responsive structure, components for modular systems, Figma variables for design tokens.

The constraint is the export step: most Figma-to-HTML tools don't generate email-safe code. Marka Email Generator is built specifically for email, outputting table-based, Outlook-compatible HTML directly from your Figma frames.

Start here: