Short answer

When designing food products, consider the psychological impact of color on taste perception and emotional response. Adjusting color intensity can be a powerful, non-intrusive method to enhance user experience and acceptance.

Field: User-Centred Design
Source: Foods (2026)
Method: Experimental study with consumer panel evaluation.
Sample: 100 participants
Evidence: Strong effect

Visual color intensity significantly influences consumer expectations of saltiness and overall liking, with darker hues leading to higher perceived taste intensity and positive emotional responses. This user-centred design research insight is drawn from a 2026 study published in Foods. Using Experimental study with consumer panel evaluation. with 100 participants, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing food products, consider the psychological impact of color on taste perception and emotional response. Adjusting color intensity can be a powerful, non-intrusive method to enhance user experience and acceptance.

Study

User-Centred DesignNew This WeekStrong effect

Darker Soy Sauce Colors Increase Perceived Saltiness and Liking

Visual color intensity significantly influences consumer expectations of saltiness and overall liking, with darker hues leading to higher perceived taste intensity and positive emotional responses.

Foods · 2026

Key Findings

01Moderate and high color intensity soy sauce samples received significantly higher liking scores for both color and perceived saltiness compared to lighter samples.
02Darker colors were strongly correlated with higher expectations of saltiness.
03Moderate color intensity evoked the most positive emotions, such as 'interested', while lighter colors were associated with negative emotions like 'disgusted' and 'bored'.

Application

Design takeaway

How to apply

When developing a new food product or reformulating an existing one, conduct sensory evaluations that include color as a variable to understand its impact on consumer preference and perception.

Project actions

01When testing a product, consider how its visual appearance might influence user perception before they even interact with its primary function.
02Think about how color can be used to communicate desired qualities, like freshness, intensity, or health benefits.

Method & Evidence

AimTo investigate how varying visual color intensities of soy sauce affect consumers' perceived saltiness, sensory liking, and emotional responses.

MethodExperimental study with consumer panel evaluation.

ProcedureFour soy sauce samples with identical salt concentrations were prepared, differing only in color intensity (light, control, moderate, high). 100 consumers evaluated each sample for color liking, saltiness perception, and associated emotions.

Sample100 participants

ContextFood product design and consumer perception.

Variables

IVVisual color intensity of soy sauce.

DV["Perceived saltiness","Sensory liking (color and saltiness)","Emotional responses"]

CVSalt concentration (kept constant across samples).

Strengths & Limitations

Strengths

+Controlled experimental design with identical salt concentrations.
+Inclusion of emotional response assessment alongside sensory liking.

Limitations

The specific color palettes and their associated meanings can be subjective and culturally dependent. Generalizing findings across all food types requires caution.

Reliability & validity

The study's validity is supported by its controlled experimental setup and the use of a standardized consumer panel. Reliability could be enhanced by replicating the study across different cultural groups or with a larger sample size.

Think critically

To what extent can visual manipulation of color compensate for actual changes in product formulation (e.g., reduced sugar or salt) while maintaining consumer satisfaction?

Design Principles

"Visual sensory cues can significantly modulate perceived taste and emotional affect, allowing for product optimization through aesthetic adjustments."

This research highlights the powerful role of visual cues in shaping sensory perception and emotional connection with food products. Designers can leverage color to manage consumer expectations and enhance product appeal, even when modifying core ingredients for health or cost reasons.

What This Means for Your Design

Making food look a certain way can change how people think it tastes and how much they like it. For soy sauce, making it look darker makes people think it's saltier and they like it more.

How to use in your project

1.Use this research to justify the importance of visual design elements in your product development process, especially when user perception is key.
2.Cite this study when discussing how aesthetic choices can influence user experience and acceptance in your design project.

Add to My Project

Quick Cite

Paragraph starter

The influence of visual cues on sensory perception is well-documented, with studies like Wongthahan et al. (2026) demonstrating that color intensity in food products can significantly alter perceived taste and consumer liking. This highlights the importance of considering aesthetic elements not just for visual appeal, but as integral components that shape the user's overall sensory experience and product acceptance.

Source

Foods

Influence of Visual Color Cues on Saltiness Expectation, Sensory Liking, and Emotions: A Soy Sauce Model Study

journal · 2026

View source

Questions About This Research

What does the research say about darker soy sauce colors increase perceived saltiness and liking?: When designing food products, consider the psychological impact of color on taste perception and emotional response. Adjusting color intensity can be a powerful, non-intrusive method to enhance user experience and acceptance. Evidence: Foods (2026).
Why does "Darker Soy Sauce Colors Increase Perceived Saltiness and Liking" matter for design?: This research highlights the powerful role of visual cues in shaping sensory perception and emotional connection with food products. Designers can leverage color to manage consumer expectations and enhance product appeal, even when modifying core ingredients for health or cost reasons.
How can designers apply this research?: When designing food products, consider the psychological impact of color on taste perception and emotional response. Adjusting color intensity can be a powerful, non-intrusive method to enhance user experience and acceptance.
What were the main findings?: Moderate and high color intensity soy sauce samples received significantly higher liking scores for both color and perceived saltiness compared to lighter samples.. Darker colors were strongly correlated with higher expectations of saltiness.. Moderate color intensity evoked the most positive emotions, such as 'interested', while lighter colors were associated with negative emotions like 'disgusted' and 'bored'.
What research method was used?: Experimental study with consumer panel evaluation. with 100 participants.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2026 journal from Foods.
What should I do differently in my next project?: When developing a new food product or reformulating an existing one, conduct sensory evaluations that include color as a variable to understand its impact on consumer preference and perception.
What are the limitations?: The study focused solely on soy sauce; findings may vary for other food products. The specific emotional responses might be culturally influenced.