Always use the API to apply system colors for developer guidance, see UIColor (UIKit) and Color (SwiftUI).
The actual color values may fluctuate from release to release, based on a variety of environmental variables. The color values provided below are intended for reference during your app design process. The system colors look great individually and in combination, on both light and dark backgrounds, and in both light and dark appearances.ĭon’t hard-code system color values in your app. IOS offers a range of system colors that automatically adapt to vibrancy and changes in accessibility settings like Increase Contrast and Reduce Transparency. For example, a colorblind user might not be able to distinguish some color combinations, and insufficient contrast can cause icons and text to blend with the background and make content hard to read for users with visual disabilities. Make sure the colors in your app send the appropriate message.Īvoid using colors that can make it hard for people to perceive content in your app. In some cultures, for example, red communicates danger in others, red has positive connotations. For developer guidance, see UIWhitePointAdaptivityStyle.Ĭonsider how your use of color might be perceived in other countries and cultures. Apps that focus primarily on reading, photos, video, and gaming can strengthen or weaken this effect by specifying a white point adaptivity style. The True Tone display uses ambient light sensors to automatically adjust the white point of the display to adapt to the lighting conditions of the current environment. If necessary, adjust colors to provide the best possible viewing experience in the majority of use cases.Ĭonsider how the True Tone display affects color. Always preview your app under multiple lighting conditions, including outdoors on a sunny day, to see how colors appear. Colors you see on your computer won’t always look the same when your app is used in the real world. Lighting varies significantly both indoors and outdoors, based on room ambiance, time of day, the weather, and more. Test your app’s color scheme under a variety of lighting conditions. Colors can also appear different when placed behind or applied to a translucent element like a toolbar. Maps, for example, displays a light color scheme when in map mode but switches to a dark color scheme when in satellite mode. Variations in artwork sometimes warrant changes to nearby colors to maintain visual continuity and prevent interface elements from becoming overpowering or underwhelming. If interactive and noninteractive elements have the same color, it’s hard for people to know where to tap.Ĭonsider how artwork and translucency affect nearby colors.
When you use a system color for your accent color, you get automatic support for both appearance modes.Īvoid using the same color for interactive and noninteractive elements. Provide two versions of your accent color to make sure it looks good in both light and dark modes. If you define an accent color that denotes interactivity, make sure other colors in your app don’t compete with it. In Notes, interactive elements are yellow in Calendar, interactive elements are red. Subtle use of color is a great way to communicate your brand.Ĭonsider choosing a color to indicate interactivity throughout your app. For example, a red triangle that warns of a critical problem becomes less effective when red is used elsewhere in an app for noncritical reasons.Ĭonsider choosing a limited color palette that coordinates with your app logo. The power of color to call attention to important information is heightened when used sparingly. If your app uses color to convey information, be sure to provide text labels or glyph shapes so users with colorblindness or other visual disabilities can understand it. Look to the system’s color scheme for guidance when picking app accent colors that look great individually and in combination, and adapt well to accessibility and appearance modes.ĭon’t rely solely on color to differentiate between objects or communicate important information. Color is a great way to impart vitality, provide visual continuity, communicate status information, give feedback in response to user actions, and help people visualize data.
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