K-Beauty Makeup Color Labels: What CI Numbers and May Contain Mean
A reader-friendly guide to color ingredient listings on Korean makeup, with US labeling examples.
Korean makeup shade names can be memorable, but the ingredient panel answers a different question from a swatch. Color Index numbers and a “may contain” list can be useful clues when comparing a lip tint, foundation or eye shadow online. Here is how to interpret them without assuming they tell you everything about the selected shade.
What is a CI number?
CI refers to a Colour Index identifier used for a color ingredient. A CI number can help identify a substance across labels, but the US FDA cautions that a CI number alone does not demonstrate that a color additive batch has received FDA certification. Some color additives used in US cosmetics require batch certification; the rules depend on the additive and intended use.
Why might a label say “may contain”?
The FDA’s US cosmetics labeling guide explains that labels may list all color additives in a shade line after “may contain.” This makes the list useful for seeing possible colors across the range, but it does not establish that every listed color is present in your selected shade. Do not apply this US example as a universal rule for every market.
Can a lipstick color be used around the eyes?
A color permitted for one use is not automatically permitted for the eye area under US rules. Use a product only on the area intended by its label. A color name on a shopping page is not a substitute for the exact product’s directions or for checking the applicable market’s requirements.
Before placing an international order
- Confirm the exact shade, product version and destination market, then request its current full ingredient panel if the seller does not display it.
- If you need to avoid a particular ingredient, ask the manufacturer about the selected shade and formulation; a range-wide list may not answer the question.
- Treat CI identifiers as ingredient information, not a visual prediction of how a shade looks on your skin.
- Compare product photos, undertone descriptions and return terms separately from the ingredient panel.
For choosing a foundation shade, THE CAST’s depth-and-undertone guide offers a separate comparison. Regulations and product labels can change, so check the current official information for your destination.