The CSB Rainbow Study Bible features a unique color-coding system that allows readers to quickly and easily identify twelve major themes of Scripture throughout the biblical text: God, discipleship, love, faith, sin, evil, salvation, family, outreach, commandments, history, and prophecy. The Bible study system also underlines all words directly spoken by God the Father, Jesus, and the Holy Spirit. With more than three million Bibles sold, the Rainbow Study Bible is the best-selling fully color-coded study Bible.