There are two main reasons we use colorants.
The first is definition. Basically, by coloring the greens it gives golfers a visual target. Without the colorant the greens have the same dormant or straw color as the approach and fairway.
The second reason, applying a dark green colorant actually keeps the surface of the green warmer. Application of colorants has shown a 4-6 week earlier green up of the Bermuda compared to non colored greens.
