Guides / Desserts & chilled sweets
Replacing Blue 1 in desserts and chilled sweets
Blue 1 (Brilliant Blue FCF, E133) is still on the label of 1,497 tracked US desserts and chilled sweets, 7% of the category we track. Here is what can replace it in this specific process, and what cannot.
Counts from the FlavorLab Dye Ban Tracker, July 2026 snapshot · dosages and regulatory status from our reviewed colorant pack
Why the category decides the answer
Pasteurised or UHT-treated, then chilled or frozen for the whole of its life. pH ranges from about 4 in gelatin and fruit desserts up to near-neutral in dairy puddings.
Mixed, closer to pH 4 in fruit and gelatin formats, near-neutral in dairy ones.
Blue is the hardest natural shade to buy. Every option is either pH-limited, heat-limited or expensive, and the choice is usually decided by the pH of the system rather than by the shade itself.
The bench reality
Cold storage is the most forgiving environment in this list. Colours ruled out elsewhere on heat (beet especially) are perfectly at home here, provided the thermal step is short.
Candidates that survive this process
Screened against this category’s heat, pH and light exposure. Dosages are published starting ranges, not formulas: supplier concentrates vary widely in pigment strength.
Galdieria extract blue (from Galdieria sulphuraria)
Phycobiliprotein · Water-soluble · cost medium-high
Shade: Blue (phycocyanin-type from an acid-tolerant red alga)
- Takes the thermal step: "Moderate"
- Holds colour at this category's near-neutral pH.
- Starting dosage
- Supplier-dependent; treat like spirulina extract as a starting frame (0.05-0.3%)
- Flavour impact
- Low-mild algal at high levels
- US status
- FDA final rule approving galdieria extract blue, May 2025, codified in 21 CFR Part 73; broad food/beverage category list at approval
- EU status
- not authorized as additive, none
Watch out: New supply base EU market
Workable, with conditions
Spirulina extract (phycocyanin)
Phycobiliprotein · Water-soluble (protein) · cost medium
Shade: Cyan-blue (the workhorse natural blue)
- Heat is the tight constraint: the pack rates it "Poor, sustained temperatures above ~60-70°C denature it; short HTST with quick cool can survive at higher pH", against a process where pasteurisation or UHT, with the product chilled from then on. The pack still lists it for ice cream, so this hinges on where in the process the colour is added: after the heat step it is viable, through it is not.
- Holds colour at this category's near-neutral pH.
- The US listing is category-restricted: "21 CFR 73.530 (spirulina extract)". It does cover this category, but confirm the current section text before specifying, since these lists are being amended.
- The colorant pack lists this category among its recommended applications: ice cream.
- Starting dosage
- 0.05-0.3% of standard extract for visible blue
- Flavour impact
- Slight vegetal/algal note possible at high levels
- US status
- 21 CFR 73.530 (spirulina extract)
- EU status
- none, coloring foodstuff, EU coloring-foodstuffs guidance (2013)
Watch out: Acidic beverages (pH < 4) Heat processing Blue 1 replacement in acid systems usually needs gardenia or butterfly pea instead
Butterfly pea flower extract (ternatin anthocyanins)
Acylated anthocyanin · Water-soluble · cost medium
Shade: Blue at mildly acidic to neutral pH; violet-purple at pH ~3-4; pink-purple lower
- Takes the thermal step: "Moderate, better than phycocyanin"
- Holds colour at this category's near-neutral pH.
- The US listing is category-restricted: "21 CFR 73.69 (butterfly pea flower extract; listed 2021, categories expanded March 2025 to include ready-to-eat cereals, crackers, snack mixes, plant-based meat alternatives and others)". It does cover this category, but confirm the current section text before specifying, since these lists are being amended.
- Starting dosage
- 0.05-0.5% extract depending on strength
- Flavour impact
- Mild floral/tea note possible at high levels
- US status
- 21 CFR 73.69 (butterfly pea flower extract; listed 2021, categories expanded March 2025 to include ready-to-eat cereals, crackers, snack mixes, plant-based meat alternatives and others)
- EU status
- not authorized, No Annex II listing; novel-food status unresolved
Watch out: EU market Exact hue vs Blue 1 expectations, bench the shade early
Ruled out in this category
These are common recommendations for Blue 1 generally. They fail here, for the reasons given, which is the difference between a colour shortlist and a colour shortlist for your process.
Gardenia (genipin) blue
Genipin-derived · Water-soluble · cost high (new supply base, premium vs spirulina)
Shade: Blue, good performance in acidic systems
- Takes the thermal step: "Good relative to phycocyanin"
- Holds colour at this category's near-neutral pH.
- Not listed for this category in the US: "FDA final rule approving gardenia (genipin) blue, July 2025, codified in 21 CFR Part 73; permitted categories at approval centered on sports drinks, flavored/enhanced waters, fruit drinks and ades, ready-to-drink teas, and hard/soft candy". Performance is not the issue; the listing is. It may still be an option in the EU, where the authorisation differs.
How to test this at the bench
- 1Lock the colour spec first. Measure the current Blue 1 product in CIELAB (L*a*b*) and agree the tolerance with marketing before any bench work. "Close enough" arguments after the fact kill more timelines than stability failures do.
- 2Screen the top two candidates above at three dosages each, in the real matrix. Pigment strength varies enough between suppliers that a spec sheet will not tell you the use level.
- 3Run the stability triangle on the survivors: target pH, the full heat process, and a light chamber or windowsill test. Most natural-colour failures are stability, not shade.
- 4Dose to end-of-shelf-life, not day one. Natural colours fade, so confirm the day-one product is not oversaturated once you have.
- 5Re-taste blind against the incumbent. A shade change alters perceived flavour intensity even when the flavour system is untouched, so check whether you need a congruent top-note lift.
Where these numbers come from
Product counts are from our own Dye Ban Tracker snapshot of July 2026, built on Open Food Facts label data under the Open Database License. That is a large crowd-sourced sample of the US market, not a census, and label data can lag a reformulation. The tracker page sets out the method and its limits in full.
Dosages, stability ratings and regulatory citations come from our reviewed colorant knowledge pack, last reviewed July 2026. Citations are summaries; the underlying regulation is authoritative, and colour additive listings differ between the US and the EU for several of the options above. Verify status for your specific market and category with regulatory counsel before committing to a route.
This guide is an ideation accelerator for professional R&D teams. It is a starting point for bench work, never a shelf-ready formula, and never a safety claim.
Get this for your actual brief
This page screens Blue 1 against a typical desserts and chilled sweets process. The copilot does it against yours (your pH, your heat step, your shelf life, your target markets) and returns a cited bench plan with dosages and a masking matrix.
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