Clearly colour-coded buckles make take off preparation easier. Red to red, green to green and black to black. Completely clear and great for learners.
New pilots are often very excited on launch and experienced pilots may be distracted with conversations with other pilots. In either case, the colour-coded buckles offer additional pre-flight safety. With this obvious and learner-friendly system there are no wrongly connected buckles and the pilot can concentrate on their pre-flight preparation.