That wording isn't very good. change the colour of what? If your talking about Blue Tongue Lizards, they connot change colour but it may change slightly as they get older. (like any animals would)
blue
a giraffe's tongue is purple and sometimes blue
Blue
blue like the blue puffle
depends, is its blue then its tongue is orange but if its orange its tongue is blue :]
It's probably because of the food dye in the actual food eg: blue lollypops: they have blue food coloring in them so it'll dye your tongue. Like a stain on a shirt!
There are blue artificial colors in them.
It depends on what you eat, but if you dont eat those candies that change the color of your tongue, then no. when was the last time your tongue was purple? YOU IDIOT!!!!!!!!!!!
The veins under your tongue don't turn blue, they just are blue. Blood is blue in color before it meets air; once it has it turns blood red.
Well, as they are called black bears, a black bears tongue is actually blue.
The color is blue because in the sun it turns blue
well.... llamas have only a few colors of spit white/clear and green (depends on what it just ate) hope this helps