Have you posted this in the"name that plant!" forum? You would probably get an answer there.

I have seen it - can't remember the name right now.

here it is http://www.hiddenvalleynaturearts.com/acatalog/htiliaceus.htm

it's called variegated hau here in Hawaii

that website says it's called "tau" in Hawaii, but that's wrong; Hawaiian doesn't use the letter T at all.

Mercury is Right... I Call it Absolutely Gorgeous :)...

Hibiscus tiliaceus'

Hibiscus tiliaceus is one of the species of hibiscus in the Mallow family and is also known as Tau in Hawaii, Purau in Tahiti, and as Sea orBeach Hibiscus among other common names. Its main feature is its foliage - beautiful, multi-colored heart-shaped leaves. The leaves are most colorful in full sun, and in shadier spots, or in a house, they grow with multiple shades of green.Hibiscus tiliaceus is a fast and easy grower that can reach 30 feet in tropical gardens. In pots it can be kept much smaller and is in fact a popular tree to bonsai in Taiwan. The unique flowers open with yellow color that turns to orange and then red before closing at the end of the day. Released from HVH in 2011. Native species.