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# Color

Represent colors using built-in or custom formats, and give users options for selecting and applying colors.

## Discussion

For design guidance, see [Human Interface Guidelines](https://developer.apple.com/design/human-interface-guidelines/macos/visual-design/color).

## Topics

### Colors

[`class NSColor`](/documentation/AppKit/NSColor)

An object that stores color data and sometimes opacity (alpha value).

[`class NSColorList`](/documentation/AppKit/NSColorList)

An ordered list of color objects, identified by keys.

[`class NSColorSpace`](/documentation/AppKit/NSColorSpace)

An object that represents a custom color space.

### Color Selection

[`class NSColorPicker`](/documentation/AppKit/NSColorPicker)

An abstract superclass that implements the default color picking protocol.

[`class NSColorWell`](/documentation/AppKit/NSColorWell)

A control that displays a color value and lets the user change that color value.

[`class NSColorPickerTouchBarItem`](/documentation/AppKit/NSColorPickerTouchBarItem)

A bar item that provides a system-defined color picker.

### Color Sampler

[`class NSColorSampler`](/documentation/AppKit/NSColorSampler)

An object that displays the system’s color-sampling interface and returns the selected color to your app.


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