Color
(Venous blood is always blue through the opaque skin).
The appearance of veins as dark blue is a wavelength phenomenon, having to do with the reflection of blue light away from the outside of venous tissue if the vein is at 0.02 inches deep or more. Deoxygenated blood is darker than oxygenated blood due to the difference in color between deoxyhemoglobin and oxyhemoglobin.
Read more about this topic: Venous Blood
Famous quotes containing the word color:
“African rights and liberty is a subject that ought to fire the breast of every free man of color in these United States, and excite in his bosom a lively, deep, decided and heart-felt interest.”
—Maria Stewart (1803–1879)
“Good Hamlet, cast thy nighted color off.”
—William Shakespeare (1564–1616)
“Gradually I regained my usual composure. I reread Pale Fire more carefully. I liked it better when expecting less. And what was that? What was that dim distant music, those vestiges of color in the air? Here and there I discovered in it and especially, especially in the invaluable variants, echoes and spangles of my mind, a long ripplewake of my glory.”
—Vladimir Nabokov (1899–1977)