OK, I'll bite! Bought my first pink tank, a luxfer alum 63, four years ago when my then 12 year old daughter had just completed her junior open water training. She dove it for three years. Now, at 16, she's taller than her mom and just 3 inches shorter than me. Last year, I bought her a luxfer alum 80 in the same hot pink color. It's the only dedicated air tank we have. When she completes her nitrox/advanced training this summer I'll have it prepared for nitrox use.
I have seen a steady supply of them here on the west coast of Florida. Nothing beats a pink tank coupled with a speargun! But in the end, after tumbling and hydro, they all are the same color. Paint doesn't hold well on the bottom, even with a boot.
Nobody's tried to make off with it yet. Unlike my fabers.
Brian