Foundation shades: compare depth and undertone separately
Use shade descriptions and controlled swatches instead of relying on a shade number across brands.
Do not transfer a number blindly
A familiar foundation number is a useful reference within a particular range, but it is not a universal shade standard. Keep the brand, range and shade name together. When you move to another formula, compare its own chart and descriptions rather than assuming the same number means the same color.
Distinguish the apparent lightness or depth of a shade from the maker’s undertone description. Two colors can have similar depth while being described differently in terms of warmth, coolness or neutrality. Read the brand’s wording rather than inferring everything from the number.
Ask for a controlled swatch
A side-by-side image is most useful when the shades share the same lighting, background and amount of product. Check whether the swatches are freshly applied or shown later. A single edited image cannot establish why a color looks different.
Compare the swatch with an item you know, but retain uncertainty about screens and lighting. A photograph can narrow a shortlist; it does not turn a remote shade choice into an exact match for everyone.
Save the complete shade identity
Write down the full label and the comparison that informed your choice. Include the finish and formula, since a familiar shade name may appear in more than one range. If you ask support for help, provide that complete identity and the alternative you are comparing.
At checkout, read the selected option again. A correct product page can still lead to the wrong purchase if the option selector remains on a default shade.