The WHG are represented by I1 and I2. When they first came into Europe about 40,000 years ago they were Black, had blue eyes and Caucasian facial features and hair texture. They never arrived to the British Isles and Scandinavia until about 10,000 years ago.
According to the reconstruction of WHG remains found in Cheddar Gorgie in England - the 'Cheddar Man' was still Black. Due to the human body's need to generate vitimin D from sunlight in the northern latitudes I would have expect the skin tone of the WHG to have evolved into much lighter skin. Was it only the arrival of the Yamnaya R1a and R1b who introduced the genes for lighter skin?