It's either dirty or has been exposed to something (heat, chemicals, etc.) that reacted with the metal. In either case it's only worth face value.
The lightness and darkness of a color is referred to as its value. Value describes how light or dark a color is in relation to white (light) and black (dark).
Nickel silver oxide typically appears as a dark brown or black powder. This compound is formed when nickel silver, an alloy of nickel, copper, and zinc, is oxidized. The color can vary slightly depending on the specific oxidation state and the conditions under which it was formed.
The value of a color is how dark or light it is. This is also called tones or shades. For example navy is a dark value and baby blue is a light value, even thought they are the exact same color.
Violet is the color that reflects the least amount of light and has a dark value.
dark color drapes in solid patterns
Value refers to the proportion of light or dark in a color.
The term that describes the lightness and darkness of a color is "value." Value refers to how light or dark a color appears on a grayscale.
Black.Black.Black.Black.
Intensity refers to the purity or vividness of a color, while value refers to the lightness or darkness of a color. Intensity is about how bright or dull a color appears, while value is about how light or dark a color appears on a scale from white to black.
The degree of lightness or darkness of a material is called its value. A high value indicates a light color, while a low value indicates a dark color. Value is an important aspect of color theory in art and design.
Before 1947, the Green Monster at Fenway Park was not the iconic green color it is known for today; it was actually a dark gray. The change to the bright green color occurred in 1947, making it a recognizable feature of the ballpark and a symbol of Boston Red Sox baseball. The transformation helped to enhance its visibility and aesthetic appeal during games.
You use a Red value from 0 - 255 Blue value 0-255 and a green value 0 - 255