I have no idea what you are doing wrong sorry, I had a quick look at FColor::FromHex()
and it contains nothing weird. I tested your two strings with FromHex()
and they worked as expected:
FString strHexWith = TEXT("#FED80DFF");
FString strHexWithout = TEXT("FED80DFF");
FColor Colour1 = FColor::FromHex(strHexWith);
FColor Colour2 = FColor::FromHex(strHexWithout);
UE_LOG(LogTraversabilityGraph, Log, TEXT("Colour1 = %s"), *Colour1.ToString());
UE_LOG(LogTraversabilityGraph, Log, TEXT("Colour2 = %s"), *Colour2.ToString());
/*
LogTraversabilityGraph: Colour1 = (R=254,G=216,B=13,A=255)
LogTraversabilityGraph: Colour2 = (R=254,G=216,B=13,A=255)
*/
You are calling static functions on an instance, which I would consider strange (and undesirable), but there is nothing wrong with it technically and it should work just the same.