SUMMARY – colour has been exploited for conspicuity for thousands of years… the first bike safety campaign was ‘Ride Bright’ in London in the mid-70s… conspicuity clothing must generate a contrast to be effective… hi-vis is only effective when it is a DIFFERENT colour or shade to the riding environment… counter-intuitively, dark colours show up against light backgrounds… for an effective colour contrast use the colour wheel… if using hi-vis choose a colour appropriate to the riding environment… pink is a good all-round choice for daytime use… but there is not likely to be a one-size-fits-all solution… don’t expect to be seen even when using hi-vis clothing…
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Photo credit Paul Townsend https://www.flickr.com/photos/brizzlebornandbred/20001313491