# getHue(_:saturation:brightness:alpha:) Returns the color object’s HSB component and opacity values in the respective arguments. ``` func getHue(_ hue: UnsafeMutablePointer?, saturation: UnsafeMutablePointer?, brightness: UnsafeMutablePointer?, alpha: UnsafeMutablePointer?) ``` ## Parameters `hue` Upon return, contains the hue component of the color object. `saturation` Upon return, contains the saturation component of the color object. `brightness` Upon return, contains the brightness component of the color object. `alpha` Upon return, contains the opacity value of the color object. ## Discussion If `NULL` is passed in as an argument, the method doesn’t set that value. This method works only with objects representing colors in the [`calibratedRGB`](/documentation/AppKit/NSColorSpaceName/calibratedRGB) or [`deviceRGB`](/documentation/AppKit/NSColorSpaceName/deviceRGB) color space. Sending it to other objects raises an exception. ## See Also [`brightnessComponent`](/documentation/AppKit/NSColor/brightnessComponent) The brightness component value of the color. [`hueComponent`](/documentation/AppKit/NSColor/hueComponent) The hue component value of the color. [`alphaComponent`](/documentation/AppKit/NSColor/alphaComponent) The alpha (opacity) component value of the color. [`saturationComponent`](/documentation/AppKit/NSColor/saturationComponent) The saturation component value of the color. --- 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)