from /indra/llmath/v3color.h

v3color.h

inline LLColor3::LLColor3(const char* color_string) // takes a string of format "RRGGBB" where RR is hex 00..FF 
{
	if (strlen(color_string) <  6)		/* Flawfinder: ignore */
	{
		mV[0] = 0.f;
		mV[1] = 0.f;
		mV[2] = 0.f;		
		return;
	}

	char tempstr[7];
	strncpy(tempstr,color_string,6);		/* Flawfinder: ignore */
	tempstr[6] = '\0';
	mV[VZ] = (F32)strtol(&tempstr[4],NULL,16)/255.f;
	tempstr[4] = '\0';
	mV[VY] = (F32)strtol(&tempstr[2],NULL,16)/255.f;
	tempstr[2] = '\0';
	mV[VX] = (F32)strtol(&tempstr[0],NULL,16)/255.f;
}