Ah you’re correct. Thank you, and I assume the reason for the Medium stone grey is because that’s what it returns if you attempt to create a BrickColor that doesn’t exist.
If you’re interested in a (possibly) more clear way to write your code, you can actually determine the string inside the new constructor instead of constructing a new object based on the bomb’s name.
local color_v = BrickColor.new(bomb.Name == "Kill Bomb" and "Bright red" or "Pastel Blue")