they would do that if you put a band around you r finger to cut off your circulation
White light minus green light would appear as a purplish color. This is because when green light is removed from white light, the remaining color components combine to create a mix of blue and red light, which results in a purplish hue.
light blue and white
Toucans, Purplish Jays, White-eared Possums, and Coatis.
Vocal cords are usually white (more in women) or a purplish color.
The yorkshire flag
Black or nude nails.
Vocal cords are usually white (more in women) or a purplish color.
lack of calcium in your body causes white stripes on teeth and nails.
The Argentinian flag is light blue then white then light blue going vertically with a sun in the middle on the white bit. Sorry I couldn't get a picture.
Nials are white for the same reason that teath are white. They are basically bones
Because of the design
Signs of iron deficiency that can be observed in the nails include spoon-shaped nails, brittle or ridged nails, and pale or white nail beds. Other vitamin deficiencies that may show in the nails include vertical ridges, white spots, and brittle or discolored nails.