My cycle club are considering a new shirt design. I seem to recall reading that block or solid colour is more visible than patterned designs. In other words a single colour shirt will stand out more than a striped one as the contrast against the background surroundings is more pronounced. I can't find anything on the web but feel sure I've read this before. The debate is not about our colours but about whether the front and back should be one colour or a mix of two. The upper half being one and the lower another.