It is a depiction of the colour of the church in terms of happiness and joy.
It is God heart to bless and provide us with every provision. Sometimes our prayer may seem like it is not answered, that He did not hear us. However, we need to understand that God’s timing and ours is different and He is always on time even though it may feel last minute (to us). In my opinion, God prefers to wait until the last minute to answer our prayers to bring about His will and His purpose for us.