What are you talking about, that's a perfect colour. It's the rest of the car that's wrong, clearly
I used to find Halfords in-store paint mixers pretty good here, they had two Bleu Ciel's listed and I always went with the one that had more white in it, matched up well. The quality of the paint wasn't so good though - Paints4u was better but the colour tended to be a bit darker. Probably more the correct colour and my paint was just faded though tbh