Are you tired of straining your eyes while working on Excel sheets in a brightly lit office? Or maybe you're working late at night and don't want to disturb your partner with the harsh glow of your screen? Excel's dark mode feature might just be the solution you're looking for. But what if you're working online and can't access the dark mode feature? Let's delve into the world of "Excel Dark Mode Online" and explore the possibilities.
Understanding Excel Dark Mode
Before we dive into the online aspect, let's first understand what Excel dark mode is. Dark mode is a display setting that inverts the colors on your screen, making light elements dark and dark elements light. In the context of Excel, this means the traditional white background becomes black, and the black text becomes white. This not only reduces eye strain but also provides a more subtle and sophisticated look to your spreadsheets.
Excel's dark mode feature is available on both Windows and Mac, but it's important to note that it's a client-side feature, meaning it's not supported in the online version of Excel. However, that doesn't mean you're out of luck if you're a heavy user of Excel Online. There are a few workarounds you can try.

Accessing Dark Mode in Excel Online: Workarounds
Using the Desktop App
If you're using Excel Online through a web browser, you might not have the dark mode feature available. However, if you're using a Microsoft 365 subscription, you can access the desktop app directly from your browser. This version of Excel does support dark mode. Here's how you can do it:
- Sign in to your Microsoft account in a web browser.
- Click on the launcher icon (the nine dots in the top-left corner).
- Click on "Excel" to open the desktop app.
- Once the app is open, click on "File" and then "Options".
- Under "General", check the box that says "Office Theme" and select "Dark".
- Click "OK" to save your changes.
Now, whenever you open Excel through your browser, it should be in dark mode.
Using a Browser Extension
Another workaround is to use a browser extension that can invert the colors on your screen. These extensions work by flipping the colors of the entire webpage, not just Excel. Here are a few options:

- Dark Reader - Available for Chrome, Firefox, and Opera, this extension inverts bright colors making them high contrast and easy to read at night.
- Night Eye - Available for Chrome, Firefox, and Edge, this extension provides a dark mode for over 4,000 websites.
While these extensions can't provide a true dark mode experience in Excel Online, they can make the overall browsing experience more comfortable on your eyes.
Dark Mode and Accessibility
Dark mode isn't just about aesthetics. It can also improve accessibility for users with visual impairments or those who are sensitive to bright lights. The high contrast between light and dark elements can make text and other elements more visible and easier to read.
Moreover, dark mode can also help reduce the blue light emitted by your screen, which has been linked to disrupted sleep patterns. This can be particularly beneficial for those who work late into the night or use their devices before bed.
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Dark Mode and Productivity
While the benefits of dark mode for your eyes and sleep are well-documented, there's also evidence to suggest that it can improve productivity. A study by Harvard Business Review found that workers using dark mode made 12% fewer errors than those using light mode. This could be due to the reduced eye strain and increased focus that comes with using dark mode.
However, it's important to note that the benefits of dark mode can vary from person to person. Some people might find it disorienting or difficult to read, especially if they're used to the traditional light mode. If you find that dark mode isn't working for you, don't hesitate to switch back to light mode.
Enabling Dark Mode in Other Microsoft 365 Apps
If you're a fan of dark mode in Excel, you might be pleased to know that it's also available in other Microsoft 365 apps. Here's how you can enable it:
| App | How to Enable Dark Mode |
|---|---|
| Word | File > Options > General > Office Theme > Dark |
| PowerPoint | File > Options > General > Office Theme > Dark |
| Outlook | File > Options > General > Office Theme > Dark |
Enabling dark mode in these apps can help create a more cohesive and comfortable working environment, especially if you're using them in conjunction with Excel.
In conclusion, while Excel's dark mode feature isn't available in the online version of the app, there are several workarounds you can try to achieve a similar effect. Whether you're using the desktop app or a browser extension, dark mode can provide a more comfortable and productive working environment. So why not give it a try and see if it works for you?






















