How many times have you seen an ads of toothpaste telling you, unless you have shiny white teeth, you need to take care of your dental hygiene? Multiple toothpaste brands sell their products saying that, Sparking white teeth have always been the standard for dental hygiene. But according to a research, the strongest teeth are slightly yellow in colour. People often believe that unless their teeth are white, they don’t have great teeth. A research has proved this scientifically wrong as the natural colour of teeth is slightly yellow or a little greyish shade.The enamel itself is in a blueish white colour, but it is also somewhat translucent so the yellow of the dentine beneath it shows through to make the overall colour of the teeth either light grey or light yellow.