UKismetMathLibrary::RGBLinearToHSV

function Engine Blueprint Since 4.18

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Converts a linear RGB FLinearColor to a packed HSV FLinearColor by value (H in R, S in G, V in B). The return-by-value form of RGBToHSV_Vector; use this when the result is immediately consumed rather than stored.

Caveats & Gotchas

• The R channel of the returned FLinearColor contains Hue in degrees [0, 360) — it is NOT a valid linear red channel. Never use the return value as a color directly; treat it as a named tuple of H, S, V.
• Round-tripping through RGBLinearToHSV → HSVToRGBLinear is not lossless for achromatic (grey) colors: hue information is discarded (set to 0) and cannot be recovered.

Signature

static UE_INL_API FLinearColor RGBLinearToHSV(FLinearColor RGB)

Parameters

Name	Type	Description	Default
RGB	FLinearColor	The linear RGB color to convert.	—

Return Type

FLinearColor

Example

Extract hue from a linear color by value C++

FLinearColor MyColor = FLinearColor(0.0f, 0.8f, 0.2f, 1.0f);
FLinearColor HSVResult = UKismetMathLibrary::RGBLinearToHSV(MyColor);
float Hue = HSVResult.R; // degrees

Version History

Introduced in: 4.18

Version	Status	Notes
5.6	stable	—

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