Short answer

Prioritize diverse color palettes in plant design, especially combinations of green with yellow or red, and consider specific proportional balances to maximize psychological relaxation benefits.

Field: Human Factors
Source: Journal of Forestry Research (2024)
Method: Mixed-methods research combining physiological measurement (EEG) and subjective self-report questionnaires.
Sample: 40 subjects
Evidence: Strong effect

Specific color combinations and proportions in tended plant communities can significantly enhance psychological relaxation, with multi-color compositions generally being more effective than single-color ones. This human factors research insight is drawn from a 2024 study published in Journal of Forestry Research. Using Mixed-methods research combining physiological measurement (eeg) and subjective self-report questionnaires. with 40 subjects, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Prioritize diverse color palettes in plant design, especially combinations of green with yellow or red, and consider specific proportional balances to maximize psychological relaxation benefits.

Study

Human FactorsRecentStrong effect

Optimal plant color combinations for psychological relaxation

Journal of Forestry Research · 2024

Key Findings

01Multi-color plant communities (two or three colors) induced stronger relaxation responses than single-color communities.
02For single-color communities, green or yellow were more relaxing than red.
03In two-color combinations, a 55% + 45% proportion was optimal, with green + yellow and green + red showing stronger relaxation effects.
04In three-color communities, 55% green + 25% yellow + 20% red yielded the strongest relaxation effect.
05Women reported significantly higher relaxation than men.

Application

Design takeaway

Prioritize diverse color palettes in plant design, especially combinations of green with yellow or red, and consider specific proportional balances to maximize psychological relaxation benefits.

How to apply

When designing outdoor spaces, parks, or even indoor plant displays, experiment with combinations of green, yellow, and red foliage, paying attention to the relative proportions of each color to enhance user relaxation.

Project actions

01When selecting plants for a design project, consider their color and how they will combine with other plants.
02Think about the psychological impact of color choices on the intended users of your design.

Method & Evidence

AimTo investigate the physiological and psychological effects of different color combinations and proportions in tended plant communities on human relaxation.

MethodMixed-methods research combining physiological measurement (EEG) and subjective self-report questionnaires.

ProcedureParticipants viewed 27 images of tended plant communities with varying color compositions (yellow, green, red) and proportions. EEG was used to measure alpha wave activity, and participants completed questionnaires assessing their relaxation levels.

Sample40 subjects

ContextEnvironmental design, landscape architecture, urban planning, interior design, psychological well-being.

Variables

IV["Color of plant communities (single, two, three colors)","Proportion of colors within communities","Specific color combinations (green, yellow, red)"]

DV["Physiological relaxation (alpha wave activity)","Psychological relaxation (subjective ratings)"]

CV["Type of plant community (tended)","Image quality and presentation","Participant demographics (though gender was a variable)"]

Strengths & Limitations

Strengths

+Combines objective physiological data with subjective user feedback.
+Investigates specific, actionable design parameters (color and proportion).

Limitations

The study used static images, so the effect of dynamic elements like movement or scent from live plants was not considered. Cultural differences in color perception might also influence results.

Reliability & validity

Reliability could be assessed by repeating EEG measurements or questionnaire administration. Validity is supported by the convergence of physiological and psychological data, though the use of images might limit ecological validity.

Think critically

How might the findings on color proportions and combinations be adapted for artificial plant displays or digital representations of nature?

Design Principles

"Color composition in naturalistic designs significantly impacts human psychological states, with multi-color, balanced palettes promoting greater relaxation."

Understanding how color influences human psychological states is crucial for designers creating environments intended to promote well-being. This research provides empirical data to inform the selection and arrangement of plant colors in landscapes, urban planning, and interior design to optimize user experience and reduce stress.

What This Means for Your Design

Using a mix of green, yellow, and red plants, in the right amounts, can make people feel more relaxed than just using one color of plant. Women felt more relaxed than men.

How to use in your project

1.Reference this study when justifying your color choices for plants in your design, especially if your project aims to create a calming or therapeutic environment.

Add to My Project

Quick Cite

Paragraph starter

The selection and arrangement of plant colors can significantly influence user well-being. Research indicates that multi-color plant communities, particularly those combining green with yellow or red in specific proportions (e.g., 55% green + 25% yellow + 20% red), elicit stronger relaxation responses compared to single-color plantings. This suggests that designers should consider the psychological impact of color palettes when specifying plant materials to create more effective and therapeutic environments.

Source

Journal of Forestry Research

Physiological and psychological responses to tended plant communities with varying color characteristics

journal · 2024

View source

Questions About This Research

What does the research say about optimal plant color combinations for psychological relaxation?: Prioritize diverse color palettes in plant design, especially combinations of green with yellow or red, and consider specific proportional balances to maximize psychological relaxation benefits. Evidence: Journal of Forestry Research (2024).
Why does "Optimal plant color combinations for psychological relaxation" matter for design?: Understanding how color influences human psychological states is crucial for designers creating environments intended to promote well-being. This research provides empirical data to inform the selection and arrangement of plant colors in landscapes, urban planning, and interior design to optimize user experience and reduce stress.
How can designers apply this research?: Prioritize diverse color palettes in plant design, especially combinations of green with yellow or red, and consider specific proportional balances to maximize psychological relaxation benefits.
What were the main findings?: Multi-color plant communities (two or three colors) induced stronger relaxation responses than single-color communities.. For single-color communities, green or yellow were more relaxing than red.. In two-color combinations, a 55% + 45% proportion was optimal, with green + yellow and green + red showing stronger relaxation effects.. In three-color communities, 55% green + 25% yellow + 20% red yielded the strongest relaxation effect.
What research method was used?: Mixed-methods research combining physiological measurement (EEG) and subjective self-report questionnaires. with 40 subjects.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2024 journal from Journal of Forestry Research.
What should I do differently in my next project?: When designing outdoor spaces, parks, or even indoor plant displays, experiment with combinations of green, yellow, and red foliage, paying attention to the relative proportions of each color to enhance user relaxation.
What are the limitations?: The study used images rather than live plants, and the findings may be specific to the cultural context of Shenyang, China.