Since the graph list "web sources" as a source, a cursory web search of "danger sign + region" reveals that red seems predominant in danger signs from: - India

Since the graph list "web sources" as a source, a cursory web search of "danger sign + region" reveals that red seems predominant in danger signs from: - India: http://3.imimg.com/data3/II/GU/MY-762554/danger-signs-boards-500x500.jpg http://3.imimg.com/data3/II/GU/MY-762554/danger-signs-boards... - Asia: http://cache4.asset-cache.net/gc/152921698-warning-these-signs-are-placed-by-mines-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=UdpLW%2FNwgyJBXS8bvU3B0JP45L0APBXzoe2WeYvI88iSZA616eQybUb29WU%2F9Y%2BO http://cache4.asset-cache.net/gc/152921698-warning-these-sig... - Africa: http://www.lifeloveandsugar.com/wp-content/uploads/2015/06/danger-sign.png http://www.lifeloveandsugar.com/wp-content/uploads/2015/06/d... - Middle East: http://cache3.asset-cache.net/gc/474346969-an-israeli-sign-is-displayed-on-a-road-at-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=GkZZ8bf5zL1ZiijUmxa7QZ0g8WYG9hGH0gmJ76R1NjT0YR6Kr%2F8%2B%2FYm5DvBrLHjzyIqwIuhXFw6OVyjDieaX1w%3D%3D http://cache3.asset-cache.net/gc/474346969-an-israeli-sign-i...