This is where elevation overlays come into play. Here’s the baseline teal and indigo color tones:ĭemo showing elevation overlay at different elevation levels The tones are numbered from 50 (lightest, least saturated tone), to 900 (darkest, most saturated tone). It defines colors as a series of tones within each color. We’re going to be talking about color tones a lot below, so here’s a quick recap on the Material color system. It’s likely that your app’s color palette has been chosen based on the assumption of a light/white background, so we likely need to make some tweaks to the color palette when the app is running in a dark theme. Next up, let’s look at your app’s color palette. Unlike text and icons we mentioned above, it is often difficult or unwanted to tint/re-color these types of content to reduce the contrast, meaning that a lighter background is the solution. Placing these against a pure black background means that the resulting contrast is much higher, which can increase eye strain. In apps though, your surfaces can contain anything: complex colorful vector animations, bright imagery, contrasting branded surfaces and lots more. These system surfaces tend to be quite simple, typically just text and simple icons, so to battle contrast issues we can adjust the text and icon colors to suit. Using a pure black #000000 color as the background in the platform, allows the system apps and surfaces to use as little power as possible when they’re open on OLED displays. This is largely a trade-off between usability vs power savings. There’s lots of discussions about why we chose grey vs black, especially since the platform in Android 10 uses a black background. The first thing you might notice is that the default background for apps in dark theme is not black, but instead a dark grey: #121212. Now let’s take a look at the design characteristics of dark theme which are described on Material.io. Since most devices before Android 10 do not have a system-level dark theme setting *, apps can provide their own in-app setting to allow users to choose what theme to use per-app. This step is optional, but allows you to support devices running versions of Android before Android 10. DayNight themes: #2: Choose what mode to be in (optional) You need to change your theme to extend from one of the Theme.MaterialComponents. To add a dark theme to your app, use Material Design Components (MDC) for Android’s support: #1: Change your theme Now that I’ve convinced you to support dark themes in your app, let’s look at how you add one… Quick start The Android team added the system-wide dark theme setting because it consistently came up as a top requested feature by users. The most important reason though is that your users want it. They help improve visual ergonomics by reducing eye strain, adjusting brightness to current lighting conditions, and facilitating screen use in dark environments - all while conserving battery power. Why support dark theme?įirst up, why support a dark theme at all? The Material.io page on Dark Theme has a good summary on some of the technical benefits (emphasis mine):ĭark themes reduce the luminance emitted by device screens. Meaning that the user has additional control over the theme of the device, but also of apps.Īlongside the recent device-wide setting, we now also have comprehensive design guidance on material.io, which we will talk about later in this blog post. The difference last year was that the platform added a device-wide setting. The default theme for Android devices was dark up until Android 5.0 ( Lollipop)! User selectable dark themes were added to the Android platform in Android 10, but that does not mean they’re new to app developers. This post is going to build upon that to see how we can adapt our apps to support dark themes.
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