# getRedValue(_:greenValue:blueValue:fromParameter:at:) Gets RGB color values (in 0.0 - 1.0 floating point) from a parameter. ``` func getRedValue(_ red: UnsafeMutablePointer, greenValue green: UnsafeMutablePointer, blueValue blue: UnsafeMutablePointer, fromParameter parameterID: UInt32, at time: CMTime) -> Bool ``` ## Parameters `red` The pointer to the plug-in variable for the red value. `green` The pointer to the plug-in variable for the green value. `blue` The pointer to the plug-in variable for the blue value. `parameterID` The unique identifier for the parameter. `time` The specified time to get the values. ## Return Value Returns `YES` if the values are retrieved successfully; otherwise `NO`. ## Discussion The returned color values are in the project working color space, unless the parameter has the [`kFxParameterFlag_DONT_REMAP_COLORS`](/documentation/professional_video_applications/kFxParameterFlag_DONT_REMAP_COLORS) flag set. If this flag is set, the color values are copied verbatim from the parameter with no conversion. Depending on the host application, the time value may be relative to the start of the timeline or to the start of the clip. See [Understanding time in FxPlug](/documentation/Professional-Video-Applications/understanding-time-in-fxplug). --- 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)