Below you will find the description of the GOL soccer ball colours. 

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Black - Sin separates us from God and keeps us out of heaven.  Romans 3:23, Romans 6:23

Red - Jesus shed his blood on the cross to pay for our sin. Romans 5:8, I Peter 3:18a

White - If we accept Jesus and turn from our sins, our hearts are made clean. John 1:12, Romans 10:9

Green - After believing and receiving what Jesus did we need to grow in our relationship with Him by reading the Bible, praying, and attending a church where the Bible is taught.  Matthew 18:20, John 1:7

Gold - God has prepared heaven for us. Revelation 21:21b