21 CFR 101.15 — Prominence of Required Label Statements
21 CFR 101.15 establishes the general prominence standards for all required food label statements — requiring that mandatory information appear conspicuously, in a type size and contrast that makes it readable under normal conditions of purchase and use. A label that technically contains required information buried in 4-point type, reversed out of a dark background, or printed in a color that blends with the package design violates this regulation.
21 CFR 101.15 establishes the general prominence and conspicuousness requirements for all mandatory statements on food labels. It is a cross-cutting rule — it applies to every required statement on every panel, supplementing the specific requirements for individual elements like the Nutrition Facts panel and ingredient list.
The Core Prominence Requirement
Under 21 CFR 101.15(a), all required label statements must:
Appear prominently and conspicuously — they must be visible to consumers under ordinary conditions of purchase and use
Be in terms that are likely to be read and understood by ordinary individuals under customary conditions of purchase and use
Not be obscured by surrounding graphic material, vignettes, or other label text
A required statement that is technically present on a label but practically invisible — due to small type, low contrast, or competing visual design elements — does not satisfy this requirement.
Minimum Type Size
Under 21 CFR 101.15(b), all required label information on the information panel must appear in type size no smaller than 1/16 inch in height (measured by the lowercase letter "o" or equivalent letter). This minimum applies to:
Ingredient list
Name and address of manufacturer, packer, or distributor
Net quantity of contents (which has its own additional size requirements under 21 CFR 101.7 based on PDP area)
Any other mandatory text on the information panel
Note: The Nutrition Facts panel has its own specific type size requirements under 21 CFR 101.9, which in many cases are larger than the 1/16 inch minimum.
Contrast Requirements
Required label information must have sufficient contrast between the type and the background to be easily read. While 21 CFR 101.15 does not specify a numerical contrast ratio (unlike web accessibility standards), FDA interprets the prominence requirement to include:
Black text on white or light backgrounds is the clearest approach
White text reversed out of a dark background is acceptable if contrast is adequate
Printing required information in a color that closely matches the background (e.g., light gray on white) is a violation
Embossed or debossed text that is difficult to read under typical lighting conditions may not meet the prominence standard
Language Requirements
Under 21 CFR 101.15(c), all required label information must be in the English language. If a label is also in a foreign language, all required elements that appear in the foreign language must also appear in English. A bilingual label must include compliant English versions of all mandatory statements.
This does not prevent brands from including voluntary foreign-language content — it requires only that required information not be provided exclusively in a foreign language.
Interaction with Specific Element Requirements
21 CFR 101.15 establishes a floor — individual regulations for specific required elements may impose stricter standards:
Label Element | Specific Requirement | Governing Regulation |
|---|---|---|
Net quantity of contents | Minimum type size scaled to PDP area (1/16" – 1/2") | |
Nutrition Facts panel | Minimum 6-point type for most text | |
Statement of identity | Bold-face type, parallel to package base | |
Structure/function disclaimer | Bold-face type, ≥ half the type size of the claim | 21 CFR 101.93 |
Allergen declarations | Must be conspicuous under FALCPA | FALCPA / FD&C Act 403(w) |
What "Obscured" Means in Practice
The prohibition on required information being "obscured" by graphic material means:
Vignettes or images overlaid on required text — prohibited
Decorative borders or backgrounds that reduce text legibility — may violate the standard
Required text printed on a pattern or texture that makes it difficult to read — may violate
Required statements placed in a fold, crease, or seam of the packaging where they cannot be read without manipulating the package — prohibited
FDA has cited brands for placing allergen statements in a font color that closely matched the background, and for printing ingredient lists on a textured label where the pattern disrupted readability.
Application to Digital and Online Labels
21 CFR 101.15 applies to the physical label on the packaged product. For online marketplace listings (Amazon, Walmart.com, DTC websites), FDA guidance and FTC requirements apply separately. However, a brand whose online listing does not prominently display required label information (or displays a label image that is too small to read) faces both FDA and FTC exposure.
How Truli Helps with Label Prominence Compliance
Type size audit: Truli checks that required statements meet the applicable minimum type size, including the 1/16 inch floor and element-specific minimums
Contrast analysis: Truli evaluates contrast between required text and backgrounds in label images, flagging low-contrast areas that may violate the conspicuousness standard
Language check: Truli verifies that all required information appears in English on bilingual labels
Obscured text detection: Truli identifies required label elements that may be obscured by overlaid graphics, background patterns, or package folds
Related Regulations
21 CFR Part 101 — FDA food labeling overview
21 CFR 101.2 — Information Panel — Panel placement and grouping requirements
21 CFR 101.3 — Statement of Identity — Bold type and parallel placement requirement for product name
21 CFR 101.7 — Net Quantity of Contents — PDP-area-based type size requirements
Frequently Asked Questions
Is there a specific contrast ratio FDA requires?
No — FDA has not adopted a numerical contrast standard for food labels. The requirement is that text be "conspicuous" and "easily read" under customary conditions. In practice, this means avoiding combinations where text and background colors are similar in value (lightness/darkness), and ensuring text is readable in typical retail lighting conditions.
Our package uses a dark background for aesthetic reasons. Is that a violation?
Not automatically. Dark backgrounds are permissible as long as required information remains clearly readable — for example, white or light-colored text on a dark background. The violation occurs when the contrast is insufficient to make required text easily read, not when the background is dark.
We sell in Spanish-speaking markets and our label is primarily in Spanish. Is that allowed?
Required label information must appear in English. A label may also be in Spanish (or any other language), but if it is, the required elements must appear in English as well. A Spanish-only label on a product sold in U.S. commerce is not compliant.
A note from Truli: Truli is not a law firm, and this article does not constitute or contain legal advice or create an attorney-client relationship. When determining your obligations and compliance with respect to relevant laws and regulations, you should consult a licensed attorney.
Last updated: April 2026. Reflects 21 CFR 101.15 as of April 2026. Book a demo to see how Truli monitors food label compliance.
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