# write(to:) Saves the color list to the file at the specified URL. ``` func write(to url: URL?) throws ``` ## Parameters `url` The URL at which to store the color list. The URL must specify either a directory or file in the file system. Specify `nil` to save the color list to the user’s `~/Library/Colors` directory. ## Discussion If `url` represents a directory, this method saves the color list in that directory in a file with the name **`.clr`, where ** is the value of the [`name`](/documentation/AppKit/NSColorList/name-swift.property) property. If `url` represents a file, this method saves the color list using the name you provided. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)