# init(colorTemperatureGradientFrom:toColorTemperature:name:textureDimensions:) Initializes a texture that creates a vertical gradient between two color temperatures. ``` init(colorTemperatureGradientFrom colorTemperature1: Float, toColorTemperature colorTemperature2: Float, name: String?, textureDimensions: vector_int2) ``` ## Parameters `colorTemperature1` The black-body color temperature, in Kelvins, at the top of the gradient. `colorTemperature2` The black-body color temperature, in Kelvins, at the bottom of the gradient. `name` The [`name`](/documentation/ModelIO/MDLNamed/name) property for the new texture object. `textureDimensions` The texel dimensions (width and height) of the texture image. ## Return Value A new color swatch texture object. ## Discussion Real-world light sources often measure color of illumination based on a black-body temperature scale. For example, the colors and characterizations of typical home and office light fixtures correspond to the following temperatures: |Label |Color |Temperature| |---------------|-------------------------------|-----------| |“Soft white” |Warm, yellowish white |2700 K | |“Bright white” |Pale yellowish white |3000 K | |“Daylight” |Bright, slightly greenish white|5000 K | |“Cool daylight”|Bright, slightly bluish white |6500 K | This initializer does not generate texel data; the [`MDLColorSwatchTexture`](/documentation/ModelIO/MDLColorSwatchTexture) class automatically generates data and caches it for reuse when you use one of the [`MDLTexture`](/documentation/ModelIO/MDLTexture) methods listed in Accessing Texture Data. --- 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)