---
title: "init(hue:saturation:brightness:opacity:)"
framework: swiftui
role: symbol
role_heading: Initializer
path: "swiftui/color/init(hue:saturation:brightness:opacity:)"
---

# init(hue:saturation:brightness:opacity:)

Creates a constant color from hue, saturation, and brightness values.

## Declaration

```swift
init(hue: Double, saturation: Double, brightness: Double, opacity: Double = 1)
```

## Parameters

- `hue`: A value in the range 0 to 1 that maps to an angle from 0° to 360° to represent a shade on the color wheel.
- `saturation`: A value in the range 0 to 1 that indicates how strongly the hue affects the color. A value of 0 removes the effect of the hue, resulting in gray. As the value increases, the hue becomes more prominent.
- `brightness`: A value in the range 0 to 1 that indicates how bright a color is. A value of 0 results in black, regardless of the other components. The color lightens as you increase this component.
- `opacity`: An optional degree of opacity, given in the range 0 to 1. A value of 0 means 100% transparency, while a value of 1 means 100% opacity. The default is 1.

## Discussion

Discussion This initializer creates a constant color that doesn’t change based on context. For example, it doesn’t have distinct light and dark appearances, unlike various system-defined colors, or a color that you load from an Asset Catalog with init(_:bundle:).

## See Also

### Creating a color from component values

- [init(_:white:opacity:)](swiftui/color/init(_:white:opacity:).md)
- [init(_:red:green:blue:opacity:)](swiftui/color/init(_:red:green:blue:opacity:).md)
- [Color.RGBColorSpace](swiftui/color/rgbcolorspace.md)