The clover is a symbol of 'Good Luck,' and the multiple ellipses are said to symbolize wisdom. Moreover, green, the color of nature, such as trees and forests, represents growth, balance, and harmony, while yellow, the color of the sun, represents intelligence, hope, and activity. The logo represents Delta Brains as a diverse group of intellectuals who use the lessons of 'Good Luck' to unite around a common goal. 'Good Luck' was ranked 5th among the best-selling books of the year in 2004 in Japan and also won the Shinpu Prize that same year.