God not only created red with light but made it the first color of the spectrum. This gives red surprising visibility, so that it is used to stain, mark, and set things apart, as when Rahab’s house was designated for salvation by a scarlet thread (Josh. 2:18). It also teaches that we first see Christ the Light as red, being redeemed and made nigh by His blood (Eph. 2:13). We might find it shocking today, but in the Old Testament God prominently decorated His church with red. The entire ceiling of the tabernacle was dyed bright red, and scarlet was prominently woven into all the fabrics—walls, veil, door, and ephod—a picture that the red stain of sin is removed and fellowship with God is enjoyed only by violent shedding of Christ’s blood under His fiery wrath (Ex. 26:14; Ex. 28:1ff.). God has so done. As symbolized by an Old Testament ceremony, God took His red heifer outside the camp, slew Him, and sprinkled His blood on the church of His covenant (Num. 19). Therefore, though your sins be as scarlet, they are white as snow; though they be red like crimson, they are as wool (Is. 1:18). … Red. For those redeemed and given boldness to enter into the holy place by the blood of Christ, red is a lovely, beautiful color. ~ Rev. W. Langerak