(#) Icon colors do not follow the recommended visual style !!! WARNING: Icon colors do not follow the recommended visual style This is a warning. Id : `IconColors` Summary : Icon colors do not follow the recommended visual style Severity : Warning Category : Usability: Icons Platform : Android Vendor : Android Open Source Project Feedback : https://issuetracker.google.com/issues/new?component=192708 Since : Initial Affects : Kotlin and Java files, manifest files and resource files Editing : This check can *not* run live in the IDE editor Implementation : [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-checks/src/main/java/com/android/tools/lint/checks/IconDetector.java) Tests : [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/IconDetectorTest.java) Copyright Year : 2011 Notification icons and Action Bar icons should only white and shades of gray. See the Android Design Guide for more details. Note that the way Lint decides whether an icon is an action bar icon or a notification icon is based on the filename prefix: `ic_menu_` for action bar icons, `ic_stat_` for notification icons etc. These correspond to the naming conventions documented in https://d.android.com/r/studio-ui/designer/material/iconography. (##) Suppressing You can suppress false positives using one of the following mechanisms: * Using a suppression annotation like this on the enclosing element: ```kt // Kotlin @Suppress("IconColors") fun method() { problematicStatement() } ``` or ```java // Java @SuppressWarnings("IconColors") void method() { problematicStatement(); } ``` * Using a suppression comment like this on the line above: ```kt //noinspection IconColors problematicStatement() ``` * Adding the suppression attribute `tools:ignore="IconColors"` on the problematic XML element (or one of its enclosing elements). You may also need to add the following namespace declaration on the root element in the XML file if it's not already there: `xmlns:tools="http://schemas.android.com/tools"`. ```xml <?xml version="1.0" encoding="UTF-8"?> <manifest xmlns:tools="http://schemas.android.com/tools"> ... <application tools:ignore="IconColors" .../> ... </manifest> ``` * Using a special `lint.xml` file in the source tree which turns off the check in that folder and any sub folder. A simple file might look like this: ```xml <?xml version="1.0" encoding="UTF-8"?> <lint> <issue id="IconColors" severity="ignore" /> </lint> ``` Instead of `ignore` you can also change the severity here, for example from `error` to `warning`. You can find additional documentation on how to filter issues by path, regular expression and so on [here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html). * In Gradle projects, using the DSL syntax to configure lint. For example, you can use something like ```gradle lintOptions { disable 'IconColors' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore IconColors ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).