Natural colours under plant-based processing conditions
This practical article helps plant-based food manufacturers connect target shades with pigment behaviour, processing conditions, ingredient interactions, supplier specifications and quality-document requirements.
Application context
Natural colours in plant-based foods should be evaluated through the complete formulation and manufacturing process. Important variables include the protein source, fat content, pH, minerals, starches, hydrocolloids, emulsifiers, processing temperature, oxygen exposure, packaging, storage conditions and target shelf life.
Plant-based beverages, meat alternatives, dairy alternatives, spreads, desserts and prepared meals can present very different colour challenges. Pea, soy, oat, rice and other plant ingredients may contribute their own beige, green, grey or yellow background shades, which can change the appearance of an added pigment.
The colour seen in a supplier sample or laboratory solution may therefore differ from the colour obtained in the finished product. Successful selection normally requires testing at the actual use level under realistic mixing, heating, cooling, packaging and storage conditions.
Common colour challenges in plant-based foods
- Ingredient background colour: plant proteins, fibres, flours and concentrates may mask or shift the intended shade.
- pH sensitivity: some natural pigments change hue or lose intensity as acidity changes.
- Heat exposure: pasteurisation, sterilisation, baking, extrusion and hot filling can reduce colour strength or alter the shade.
- Protein interactions: pigments may bind to proteins, distribute unevenly or become less visually intense in opaque systems.
- Minerals and metals: calcium, iron, copper and other minerals can influence pigment stability or colour development.
- Light and oxygen: exposure during processing and storage can accelerate fading or unwanted colour changes.
- Phase distribution: water-soluble and oil-dispersible colours behave differently in emulsions, coatings and fat-rich products.
Selection points
- Define the target shade. Use a physical reference, approved sample or measurable colour target rather than a general description such as red, yellow or brown.
- Identify the product matrix. Confirm whether the application is a beverage, emulsion, meat alternative, dairy alternative, sauce, dessert, bakery product or coating.
- Review pH and processing temperature. These conditions can strongly influence the stability of natural pigments.
- Select the correct format. Powders, liquids, emulsions and oil-dispersible products may have different handling and distribution properties.
- Compare colour strength. Commercial products may contain different pigment concentrations, carriers and standardisation systems.
- Check compatibility. Evaluate interactions with proteins, acids, minerals, hydrocolloids, preservatives, flavours and packaging materials.
- Review label expectations. The distinction between a food colour, colouring food, extract or other ingredient description depends on the product and destination market.
- Conduct shelf-life trials. Monitor shade, fading, separation and package-to-package consistency throughout the expected storage period.
Process and formulation considerations
The addition point can influence colour distribution and stability. Some products perform best when pre-dispersed in water, oil or another compatible carrier before entering the main batch. Direct addition to a concentrated protein or mineral phase may create spotting, incomplete dispersion or local shade variation.
High-shear mixing, homogenisation and extrusion can improve distribution but may also expose the pigment to heat and oxygen. Process teams should record mixing speed, treatment time and product temperature during colour trials.
Heat stability should be evaluated under the actual production profile rather than through temperature alone. The combination of temperature, holding time, pH and oxygen exposure determines the final effect on many natural colours.
Packaging can support colour retention. Light-barrier materials, low residual oxygen, suitable seals and controlled storage temperatures may help reduce fading. Transparent packaging should be tested under the expected retail-light conditions.
Information commonly recorded during trials
- Base-product colour before colour addition.
- Protein, fat, mineral and pH profile.
- Colour identity, strength, carrier and physical form.
- Use level and addition sequence.
- Mixing, homogenisation, extrusion or heat-treatment conditions.
- Shade immediately after processing and after cooling.
- Packaging type, light exposure and storage temperature.
- Colour measurements and visual observations during shelf life.
Documents and quality checks
Before confirming an order, buyers commonly review a current product specification or technical data sheet, certificate of analysis, composition, colour strength or active content, safety data sheet where applicable, country of origin, shelf-life statement, storage conditions, label information and packing documents.
The specification should explain how colour strength is standardised and which carriers, emulsifiers, stabilisers or processing aids are present. Buyers may also need information on solubility, dispersibility, particle size, pH, moisture and microbiological limits.
Additional declarations may be required depending on the destination market and customer requirements. These can include non-GMO, allergen, vegan, halal, kosher, irradiation, residual solvent and colouring-food or natural-colour status statements.
Questions to ask during supplier qualification
- What is the colour source and standardised colour strength?
- Which carriers, emulsifiers or stabilisers are included?
- Is the product water-soluble, oil-dispersible or supplied as an emulsion?
- What pH and temperature range is commonly recommended?
- Which parameters appear on the certificate of analysis?
- What storage temperature and light protection are required?
- Which destination-market declarations are available?
- What packaging sizes and minimum order quantities can be supplied?
Related product group
This topic is connected to Colours & Colouring Foods. The most suitable product depends on the required shade, formulation, processing conditions, label target and destination-market regulations.
Related product pages available on this website include:
- Curcumin — a yellow pigment considered for suitable plant-based foods, coatings, sauces and emulsified products.
- Riboflavin — a yellow vitamin and colour source used in selected food and nutritional applications.
- Riboflavin-5-Phosphate — a more water-compatible riboflavin form considered for selected liquid and nutritional systems.
- Tartrazine — a synthetic yellow colour used in permitted food applications where a standardised, high-intensity shade is required.
- Quinoline Yellow — a synthetic yellow colour used in selected permitted applications.
- Sunset Yellow FCF — a synthetic orange-yellow colour used in permitted food and beverage categories.
How to turn this topic into an inquiry
To receive a more relevant quotation, send the target shade, plant-based food category, base-product colour, pH, processing temperature, preferred colour format, expected quantity, destination country and required documents.
State whether the product must meet a natural-colour, colouring-food, vegan or other label objective. Include any current concern such as fading, heat instability, uneven dispersion, precipitation or shade variation between production batches.
If you have a current supplier specification, certificate of analysis, colour standard, finished-product image or laboratory sample reference, include the key details so potential alternatives can be compared more accurately.