Stock BMW factory HID is 4300 Kelvin, like most vehicle stock.
If you wanted to match your Low beam or your angel eyes that match stock lights you should have purchased 4300K. The LED kelvin temperature is likely accurate but as the above poster mentioned the refraction through the angel housing tones down the blue making it look like a warm white. No manufacturer is at fault here either lux or HPB.
HPB and LUX service is top notch by the way.