Copper Coin Designations

I'm not quite sure "designation" is accurate, but we're going with it.

For Copper Coins, including standard bronze or copper plated, we have Red, Red-Brown, and Brown.

But what about other copper compounds? Like Nickel-Brass, or Nordic Gold, or Manganese Brass?

Clearly they oxidize.

Are there any terms used in Numismatics to describe a "Red" Nickel-Brass coin from a heavily oxidized "Brown" nickel-brass?

Or "red" and "brown"? Even though that's technically inaccurate?