At its most basic, dark mode is a colour scheme setting that users can enable on their device, operating system, browser, or specific apps. Once switched on, supported software will display darker backgrounds with lighter text and interface elements. Think grey backgrounds, off-whites, and less harsh lighting overall.
For marketers, this matters most regarding content appearance and readability. Let’s say you’re sending out an email campaign to your customer base. If you’ve carefully designed your brand’s newsletter using dark text on a transparent or white background image, and your recipients have dark mode enabled, that image might sit against a dark background instead. That can lead to issues like invisible text, logos that disappear, or buttons that blend into the background.
This isn’t just theory. Real people face this. Designers often run into support tickets or user complaints like, “I can’t read this button on my phone,” or “Half the email text is invisible.” And it’s not a small problem, either. With both Apple Mail and Outlook supporting dark mode, not to mention Gmail on mobile, a growing segment of users will see your content this way, whether you planned for it or not.
From a development and design perspective, the fix often involves using transparent image files, testing your email or app in light and dark mode, and using CSS media queries to adjust colours automatically.
Respond, publish and manage customer conversations on the go with a mobile workflow built for crises, events and field teams.
Many look at WhatsApp for Business as a simple newsletter channel or service chat at best. Get inspired by these 5 ready-to-go marketing examples.
On 25 and 26 March, we're exhibiting at the Webwinkel Vakdagen in the Jaarbeurs in Utrecht, The Netherlands.
When you are handling orders, in B2B or B2C, order confirmation emails play a critical role in the customer journey. Stop sending boring emails!
Add some extra sparkle to your campaigns by pinning them to the big dates and events of 2026. See all key dates in our handy calendar.
Black Friday & Cyber Monday 2025: Spotler breaks email sending records with 148 million emails.
Being a mum and working in marketing have a lot in common. You will need creativity, resilience, and the ability to juggle a dozen things at once.
Not all emails are created equal! Make the most of your audience’s attention with these 21 techniques.
Discover how WhatsApp strengthens your ecommerce strategy. Boost conversions, build trust and deliver fast, personal communications.
Everything you should know about UTMs and how to use them effectively, from character limits to the one place they can't help you.