Some inks are just for fun. Unusable in the office, unusable for long notes, letters or stories, but they might work on for example greeting cards. I expected Corail des tropiques to be one of those colors. It's not pink, it's not orange, it's definitely not red. It mostly reminds me of salmon, but I'm sure there's coral out there somewhere in this color too. There is no arguing about taste, but personally I believe "ugly" doesn't even come close.
And even though the color is quite unique - other inks are either way more orange or way more pink - this means Corail des tropiques is a poorly behaving ink in a difficult color. That makes it a waste of money in my eyes.