UKismetMathLibrary::RGBToHSV_Vector

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Converts a linear RGB FLinearColor to a packed HSV FLinearColor (H in R, S in G, V in B). Use this when you want to manipulate color in HSV space but work with FLinearColor containers throughout.

Caveats & Gotchas

• The output FLinearColor's R channel holds hue in the range [0, 360) — not [0, 1]. Treating the result as a normal linear color (e.g., passing it to a material parameter expecting RGB) will produce wildly incorrect colours.
• For achromatic inputs (grey), H is set to 0 and S is 0. When reconstructing via HSVToRGB_Vector, a round-trip through grey will always produce hue 0 regardless of the original hue.

Signature

static UE_INL_API void RGBToHSV_Vector(FLinearColor RGB, FLinearColor& HSV)

Parameters

Name	Type	Description	Default
RGB	FLinearColor	The linear RGB input color.	—
HSV	FLinearColor&	Output FLinearColor with H packed into R [0..360), S into G [0..1], V into B [0..1], and alpha passed through.	—

Return Type

void

Example

Pack RGB into HSV for storage C++

FLinearColor HSVPacked;
UKismetMathLibrary::RGBToHSV_Vector(FLinearColor(0.0f, 0.5f, 1.0f, 1.0f), HSVPacked);
// HSVPacked.R ~ 210, HSVPacked.G = 1.0, HSVPacked.B = 1.0

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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