UKismetMathLibrary::ToHex_LinearColor

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Converts a linear color to an uppercase 8-character hex string in RRGGBBAA format by first quantising to 8-bit per channel. Useful for serialization, debugging, and CSS-style color output.

Caveats & Gotchas

• The conversion clamps each channel to [0,1] before quantising to 8-bit — HDR channel values above 1.0 will be silently clamped to FF, losing HDR information.
• The output is RRGGBBAA (alpha last), not AARRGGBB — this differs from the FColor constructor format used in some other UE APIs.

Signature

static UE_INL_API FString ToHex_LinearColor(FLinearColor InColor);

Parameters

Name	Type	Description	Default
InColor	FLinearColor	Linear color to convert.	—

Return Type

FString

Example

Log a color for debugging C++

FLinearColor Color = FLinearColor(0.f, 0.502f, 1.f, 1.f);
FString Hex = UKismetMathLibrary::ToHex_LinearColor(Color);
UE_LOG(LogTemp, Log, TEXT("Color hex: %s"), *Hex); // e.g. "0080FFFF"

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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