Natural Food Color Comparison Matrix
Side-by-side performance data for seven natural colors across heat, light, pH, and application suitability — with full test condition disclosure.
| Colorants Covered: | 7 |
| Test Variables: | Heat, Light, pH |
| Data Source: | Binmei In-House Laboratory |
| Last Updated: | May 2026 |
How to Read This Comparison
This chapter compares six natural food colors from Binmei's laboratory testing program: Spirulina Extract, Butterfly Pea Flower Extract, Aronia Extract, Black Carrot Extract, Beet Extract, and Sea Buckthorn Extract. Each is evaluated across three stability dimensions and seven application categories.
Rather than reduce performance to a single star rating, this matrix presents the actual retention rate data from controlled laboratory tests, alongside the test conditions used. This approach prioritizes scientific accuracy over marketing simplicity.
Heat Stability Comparison
Heat is one of the three primary stability variables for natural food colors. The table below shows color retention rate after 4 hours of heat exposure, with test conditions disclosed.
| Natural Color | Colouring Principle | Test Temperature | Test pH | Retention @ 4h | Performance Summary |
|---|---|---|---|---|---|
| Spirulina Extract | Phycocyanin | 80°C | 5-7 | 6.8% @ 3h | Highly heat-sensitive. Suitable below 60°C for short-duration processes. Not recommended for pasteurization or HTST. |
| Butterfly Pea Flower Extract | Anthocyanins | 80°C | 3 | 97.45% | Excellent heat stability. Suitable for baking, pasteurization, and high-heat acidic processing. |
| Aronia Extract | Anthocyanins | 80°C | 3 | 85.06% | Strong heat performance at low pH. Suitable for hot-fill beverages and pasteurized acidic products. |
| Black Carrot Extract | Anthocyanins | 80°C | 3 | 85.10% | Strong heat stability comparable to Aronia Extract. Reliable for pasteurization at low pH. |
| Beet Extract | Betanin | 40°C | 5 | 85.10% | Tested under low-heat conditions due to betanin's known heat sensitivity. Not directly comparable to anthocyanin colors tested at 80°C. |
| Sea Buckthorn Extract | Carotenoids | 80°C | 5.5 | 78.40% | Acceptable heat stability at near-neutral pH. Suitable for bakery and dairy applications. |
Key Finding: Heat Stability
Among colorants tested at 80°C and pH 3, Butterfly Pea Flower Extract leads (97.45%), followed by Black Carrot Extract and Aronia Extract (both ~85%). Spirulina Extract is the clear outlier — its phycocyanin protein structure denatures rapidly above 60°C and is not suited to high-heat processes.
Light Stability Comparison
Light degradation matters most for products with long shelf life under transparent or translucent packaging. The table below shows color retention after 40 days under continuous light exposure.
| Natural Color | Light Intensity | Test pH | Retention @ 40 days | Performance Summary |
|---|---|---|---|---|
| Spirulina Extract | Variable | 5-8 | 3.6% @ pH 5, 15d | Highly light-sensitive across all pH levels. Requires opaque packaging for any meaningful shelf life. |
| Butterfly Pea Flower Extract | 8000 lux | 3 | 98.65% | Outstanding light stability. Suitable for transparent packaging and long shelf-life products. |
| Aronia Extract | 8000 lux | 3 | 61.48% | Moderate light stability. Consider opaque packaging or shorter shelf life targets. |
| Black Carrot Extract | 8000 lux | 3 | 59.10% | Moderate light stability. Best for protected packaging formats. |
| Beet Extract | 4000 lux | 5 | 58.10% | Tested at half the light intensity used for anthocyanin colors. Not directly comparable. |
| Sea Buckthorn Extract | 8000 lux | 5.5 | 53.20% | Carotenoid-based color with moderate light sensitivity. Light protection recommended. |
Key Finding: Light Stability
Butterfly Pea Flower Extract is the clear leader in light stability (98.65%), retaining nearly all of its color over 40 days under continuous 8000 lux exposure. Most red and yellow colorants lose 40-50% of their color under the same conditions, making opaque or UV-blocking packaging essential for long-shelf-life products using anthocyanin or carotenoid colors.
pH Stability Comparison
pH is the single largest variable for natural food color selection. The two main pigment families — anthocyanins and phycocyanin — respond to pH in opposite ways. Understanding this is the foundation of natural color formulation.
Phycocyanin pH Response (Spirulina Extract)
Spirulina Extract delivers a vivid blue at neutral pH, but degrades rapidly below pH 4. Binmei laboratory data shows color retention drops from 96.3% at pH 5.8 to 27.4% at pH 3.4 — a near-collapse over a 2.4-unit pH shift.
| pH | 6.2 | 5.8 | 5.4 | 5.0 | 4.6 | 4.2 | 3.8 | 3.4 |
|---|---|---|---|---|---|---|---|---|
| Retention % | 100% | 96.3% | 92.5% | 89.1% | 84.6% | 82.2% | 74.8% | 27.4% |
Anthocyanin pH Response (Butterfly Pea Flower Extract, Aronia Extract, Black Carrot Extract)
Anthocyanin colors behave inversely to phycocyanin. They are most stable at low pH (3.0-3.5) and degrade or shift color toward blue/grey at neutral and alkaline pH. Aronia Extract and Black Carrot Extract retain over 85% color when tested at 80°C and pH 3 over 4 hours; their performance at neutral pH (5-7) is significantly weaker and not directly tested in this dataset.
Key Finding: pH Behavior is the Decision Variable
If your product pH is below 4: Anthocyanin colors (Butterfly Pea Flower Extract, Aronia Extract, Black Carrot Extract) are the natural choice. Phycocyanin will fail.
If your product pH is 5-7: Phycocyanin (Spirulina Extract) performs well; anthocyanin reds may shift toward blue or grey and lose intensity.
If your product pH is above 7: All natural colors face stability challenges. Application-specific formulation is required.
Application Suitability Matrix
The table below maps each natural color against major food application categories. Suitability is determined by the intersection of pH, heat, light, and packaging context typical for each category.
| Natural Color | Beverages (pH 3-4, transparent) |
Dairy & Yogurt (pH 4-6.5) |
Ice Cream (pH 6-7, frozen) |
Bakery (pH 5-7, high heat) |
Candy & Confectionery (pH 3-5) |
Supplements (varied) |
|---|---|---|---|---|---|---|
| Spirulina Extract |
Not recommended | Recommended | Strongly recommended | Not recommended | Conditional | Recommended |
| Butterfly Pea Flower Extract |
Strongly recommended | Conditional | Recommended | Recommended | Strongly recommended | Recommended |
| Aronia Extract |
Strongly recommended | Recommended | Conditional | Conditional | Strongly recommended | Recommended |
| Black Carrot Extract |
Strongly recommended | Recommended | Recommended | Conditional | Strongly recommended | Recommended |
| Beet Extract |
Conditional | Strongly recommended | Strongly recommended | Not recommended | Conditional | Recommended |
| Sea Buckthorn Extract |
Recommended | Strongly recommended | Recommended | Recommended | Conditional | Recommended |
Suitability ratings are directional and based on the intersection of stability data and typical category processing conditions. Always validate with product-specific application testing.
At-a-Glance Summary by Color Need
Use this quick guide to narrow your shortlist before reviewing full datasets.
Need: Blue at low pH
→ Butterfly Pea Flower Extract
× Avoid Spirulina Extract
Need: Blue at neutral pH
→ Spirulina Extract (cold/low-heat applications)
× Avoid Butterfly Pea Flower Extract above pH 7 (color shifts)
Need: Red for low-pH beverage
→ Aronia Extract, Black Carrot Extract
Need: Red for dairy (low heat)
→ Beet Extract, Black Carrot Extract
× Avoid Beet Extract in high-heat processes
Need: Red for bakery (high heat)
→ Aronia Extract, Black Carrot Extract
× Avoid Beet Extract
Need: Yellow / orange shade
→ Sea Buckthorn Extract
× Use opaque packaging for light protection
Need: Maximum heat stability
→ Butterfly Pea Flower Extract
→ Aronia Extract, Black Carrot Extract (at low pH)
Need: Maximum light stability
→ Butterfly Pea Flower Extract
× All others need light protection
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