The color coral is a mix of pink and tangerine, you could try a ratio of three parts pink to one part tangerine for a vivid shade of coral. If a paler shade is preferred, add some white until the desired shade is obtained.
2 Additional Answers
Coral is described as being a pinkish-orange color and it can be quite hard to match or duplicate. It is suggested that combining 3 parts of a rose pink with 2 parts of a lemon yellow colors would make a great coral.
Since coral is a shade of pink, you could experiment with a mixture of red and white plus orange, depending if you want a dark shade of coral or a light shade.