Rust colour!
Answer
Iron does not tarnish it will simply rust.
copper
Pure francium is a silvery-white color, but it is highly reactive and quickly tarnishes to a darker color when exposed to air due to oxidation.
Silver is used in film media because it tarnishes better than other materials.Tarnish is the process of oxidation, where a metal turns from some some shiny color to a darker non-shiny color.Three Examples of Tarnish:Gold: Starts a bright shiny gold color and tarnishes to a slightly darker dull gold colorCopper: Starts a bright shiny orange-gold color and tarnishes to a green patina colorSilver: Starts a bright almost white color and tarnishes to a very dark grey, almost black colorSilver provides the best tonal range, from light to dark. It can capture light from pure white to pure black (or very close).Additionally, silver tarnishes very consistently. This provides a smooth transition from light to dark on film.
gray. it's.................. the color of iron
Iron oxide is typically a reddish-brown color.
Iron has a metallic luster, appearing shiny and reflective when polished. It has a silvery-gray color in its pure form.
The color of iron (III) chloride solution is brown.
Iron nitrate typically produces a yellow-orange flame color when it is heated. This color is due to the presence of iron ions in the compound.
Lithium, Sodium and potassium are all soft metals which can be cut easily with a knife. This freshly cut piece is a shiny silver color which tarnishes quickly to a dull grey as these metals react with the oxygen and water in air. Sodium tarnishes quicker than Lithium and potassium tarnishes quicker than sodium. Thus, Potassium tarnishes quicker than lithium and not the other way around.
Pure iron is grey. Iron compounds have different colours, for example iron chloride is yellow, iron(II) hydroxide is green and iron(III) oxide is red-brown.
Iron precipitate can vary in color depending on the oxidation state of the iron. It can appear as orange, brown, or red in color.
Iron(II) sulfide is a dark green to black color. Iron(III) sulfide is a brownish black color.