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Replacing Blue 1 in sodas and carbonated drinks

Blue 1 (Brilliant Blue FCF, E133) is still on the label of 535 tracked US sodas and carbonated drinks, 8.5% 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

Cold-fill or a brief HTST pasteurisation, then months on a lit shelf in clear PET. Phosphoric or citric acid puts the finished drink at pH 2.5-3.5.

Strongly acidic, pH 2.5-3.5, lower than almost any other category here.

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

Light, not heat, is what kills colour here, and the low pH rules out the workhorse natural blue outright. Oil-soluble carotenoids need proper beverage emulsion grades or they will ring the neck of the bottle.

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.

Nothing clears this category’s constraints outright, which is itself the finding. Every route below carries a condition you will have to design around, so pick the condition you can live with rather than the colour you like.

Workable, with conditions

Gardenia (genipin) blue

Genipin-derived · Water-soluble · cost high (new supply base, premium vs spirulina)

Workable, with conditions

Shade: Blue, good performance in acidic systems

  • Takes the thermal step: "Good relative to phycocyanin"
  • Acid is where this one is strongest: "Good in acid, its headline advantage over spirulina for beverages"
  • The US listing is category-restricted: "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". 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: acidic beverages needing true blue.
Starting dosage
Supplier-dependent; published applications commonly 0.01-0.2%
Flavour impact
Low at use levels
US status
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
EU status
not authorized, No Annex II listing

Watch out: US category restrictions EU not authorized Supply/cost while the market matures

Galdieria extract blue (from Galdieria sulphuraria)

Phycobiliprotein · Water-soluble · cost medium-high

Workable, with conditions

Shade: Blue (phycocyanin-type from an acid-tolerant red alga)

  • Takes the thermal step: "Moderate"
  • Light is the risk to manage: "Moderate", and clear PET on a lit shelf for six to twelve months is the defining constraint in this category. Budget for a light study, a UV-barrier pack or a dosing overage.
  • Holds colour at this category's low pH.
  • The colorant pack lists this category among its recommended applications: beverages; broader blue applications where spirulina's pH window fails.
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

Butterfly pea flower extract (ternatin anthocyanins)

Acylated anthocyanin · Water-soluble · cost medium

Workable, with conditions

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"
  • Light is the risk to manage: "Moderate-good", and clear PET on a lit shelf for six to twelve months is the defining constraint in this category. Budget for a light study, a UV-barrier pack or a dosing overage.
  • 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.
  • The colorant pack lists this category among its recommended applications: acidic beverages (blue-violet).
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.

Spirulina extract (phycocyanin)

Phycobiliprotein · Water-soluble (protein) · cost medium

Ruled out by this process

Shade: Cyan-blue (the workhorse natural blue)

  • Takes the thermal step: "Poor, sustained temperatures above ~60-70°C denature it; short HTST with quick cool can survive at higher pH"
  • Light is the risk to manage: "Moderate, fades on extended light exposure", and clear PET on a lit shelf for six to twelve months is the defining constraint in this category. Budget for a light study, a UV-barrier pack or a dosing overage.
  • pH rules it out: "Best pH 4.5-8; below ~pH 4 the protein denatures/precipitates and color fades, a core beverage limitation", against a category that is strongly acidic, ph 2.5-3.5, lower than almost any other category here.
  • 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.

How to test this at the bench

  1. 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.
  2. 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.
  3. 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.
  4. 4Dose to end-of-shelf-life, not day one. Natural colours fade, so confirm the day-one product is not oversaturated once you have.
  5. 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 sodas and carbonated drinks 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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