UE4: Conver String HEX Color to RGB or RBGA in Blueprint

Question

How to convert HEX Color String to RGB or RBGA in Unreal Engine's Blueprint. For example: #f0f8ff to 240/248/255 RGB vector.

Thanks a lot.

Answer 1

Since the Blueprint API does not support Hex to RGB or RGB to Hex, but the regular FColor struct does, I'd suggest, you write yourself a wrapper for it in a UBlueprintFunctionLibrary.

I won't go into detail how to create one of these libraries, since you can find an easy tutorial in the Unreal Wiki. However, I may give you the code that will hopefully work:

part of the header:

/** Converts hex string to color. Supports formats RGB, RRGGBB, RRGGBBAA, RGB, #RRGGBB, #RRGGBBAA */
UFUNCTION(BlueprintCallable, Category="YourFunctionLibrary")
static FColor HexToColor(FString HexString);

/** Converts color to hex string */
UFUNCTION(BlueprintCallable, Category="YourFunctionLibrary")
static FString ColorToHex(FColor Color);

part of the compilation unit:

FColor YourFunctionLibrary::HexToColor(FString HexString)
{
    return FColor::FromHex(HexString);
}

FString YourFunctionLibrary::ColorToHex(FColor Color)
{
    return Color.ToHex();
}

Haven't tried it yet, but hope it works!