I've had a Dulux tester pot of BS 630 French Grey made locally and this has matched to my requirements for a garage door. I needed paint for the metal door and gave the same BS number for a 2.5 litre tin of Combicolour but the colour is very different to the tester pot - more of a blue grey than a green grey. Should I accept this or should I expect what I thought I'd get. I've actually painted the whole door and it isn't exactly right (to match my windows also BS630) and I'm wondering if I'm justified in going back to the shop where I ordered the paint? Thanks anyone!