Primary
#3B82F6
#3B82F6
Virtual Color Palette Simulator (USA)
Create and visualize color palettes with our virtual color simulator. Calculate color harmony and contrast ratios for interior design projects.
How Our Color Simulator Works
Our simulator uses fundamental color theory formulas to calculate harmony and contrast:
\[\text{Color Harmony} = \frac{\text{Primary Color} + \text{Secondary Color}}{2}\]
\[\text{Contrast Ratio} = \frac{\text{Luminance of Lighter Color}}{\text{Luminance of Darker Color}}\]
- Formula 1: Color Harmony = (Primary Color + Secondary Color) ÷ 2
- Formula 2: Contrast Ratio = Luminance of Lighter Color ÷ Luminance of Darker Color
- Key Components: Color Values, Luminance Calculation, Harmony, Contrast
Color Palette Simulator
Harmony
#8B94A8
#8B94A8
Secondary
#EF4444
#EF4444
#3B82F6
Primary
#8B94A8
Harmony
#EF4444
Secondary
4.5
Contrast Ratio
Contrast Ratio Indicator
Low (1:1)
AA (4.5:1)
AAA (7:1)
Color Harmony Principles
🎨
Complementary
Opposite on color wheel
🌈
Analogous
Adjacent on color wheel
✨
Triadic
Evenly spaced colors
🌟
Monochromatic
Variations of one hue
Contrast Standards
WCAG AA Large Text
3:1 ratio
WCAG AA Normal Text
4.5:1 ratio
WCAG AAA Normal Text
7:1 ratio
Decorative Elements
No minimum
Color Recommendations
Based on your selected colors:
- Use primary color for dominant elements
- Use secondary color for accents
- Harmony color for neutral backgrounds
- Maintain accessibility with sufficient contrast
Color Theory Guide
Definition of Color Harmony
Color harmony is the pleasing arrangement of colors that creates visual balance and aesthetic appeal. It involves combining colors in ways that are satisfying to the human eye, following established principles of color theory. Harmonious color schemes are essential for creating cohesive and attractive interior designs.
Calculation Method
Our simulator uses two fundamental formulas:
- Color Harmony = (Primary Color + Secondary Color) ÷ 2
- Contrast Ratio = Luminance of Lighter Color ÷ Luminance of Darker Color
These formulas enable accurate calculation of color relationships and accessibility compliance.
Important Rules
- Ensure sufficient contrast for accessibility (minimum 4.5:1 for normal text)
- Consider cultural meanings of colors in design context
- Test color combinations under different lighting conditions
- Account for color vision deficiencies in design choices
Tip 1: Use the 60-30-10 rule for room color distribution: 60% dominant color, 30% secondary color, 10% accent color. This creates visual balance and prevents overwhelming color schemes.
Tip 2: Consider the room's function when choosing colors. Cool colors (blues, greens) promote calmness in bedrooms, while warm colors (reds, oranges) energize spaces like dining rooms.
Tip 3: Test your color choices by painting large sample patches on walls. Colors look different in large areas versus small swatches, and lighting conditions significantly affect perception.
Color Theory Quiz
Question 1: Color Harmony Calculation
Using the formula Color Harmony = (Primary Color + Secondary Color) ÷ 2, what would be the harmony color if Primary = #FF0000 and Secondary = #0000FF?
Solution & Explanation
Using the formula: Color Harmony = (Primary Color + Secondary Color) ÷ 2
For #FF0000 (red) and #0000FF (blue):
Red: (255 + 0) ÷ 2 = 127.5 ≈ 128
Green: (0 + 0) ÷ 2 = 0
Blue: (0 + 255) ÷ 2 = 127.5 ≈ 128
Result: #800080 (purple/magenta)
The correct answer is B) #800080.
Pedagogy Note
This question tests understanding of the color harmony calculation. Remember that hex colors are converted to RGB values for mathematical operations.
Question 2: Contrast Ratio
What does the contrast ratio formula measure?
Solution & Explanation
Using Formula 2: Contrast Ratio = Luminance of Lighter Color ÷ Luminance of Darker Color
This formula measures the brightness difference between two colors, which is crucial for accessibility and readability.
The correct answer is B) Brightness difference between colors.
Contrast Definition
Contrast ratio measures the luminance difference between two colors, determining how easily they can be distinguished from each other.
Question 3: Accessibility Compliance
According to WCAG guidelines, what is the minimum contrast ratio required for normal-sized text?
Solution & Explanation
WCAG (Web Content Accessibility Guidelines) specify that normal-sized text (less than 18pt or 14pt bold) must have a minimum contrast ratio of 4.5:1 to meet AA compliance.
For AAA compliance, the ratio must be 7:1.
The answer is 4.5:1.
Accessibility Rule
For accessibility compliance, normal text requires a 4.5:1 contrast ratio, while large text (18pt+) requires 3:1.
Question 4: Color Psychology
Which color is generally associated with feelings of calmness and tranquility?
Solution & Explanation
Blue is universally associated with feelings of calmness, tranquility, and serenity. It has a soothing effect on the mind and body, making it ideal for bedrooms and relaxation spaces.
Red is associated with energy and passion, yellow with happiness and attention, and orange with enthusiasm and creativity.
The correct answer is B) Blue.
Pro Tip
When designing spaces for relaxation (bedrooms, spas), incorporate blue tones to promote calmness. For energetic spaces (gyms, offices), consider warmer colors like red or orange.
Question 5: Color Temperature
What is the color temperature range for "warm" colors in Kelvin?
Hint: Color temperature is measured in Kelvin (K) and relates to the warmth or coolness of light sources.
Solution & Explanation
Warm colors and light sources typically fall in the range of 1000K-3000K:
- 1000K-2000K: Candlelight, sunrise/sunset
- 2000K-3000K: Traditional incandescent bulbs, warm white LED
- 3000K-5000K: Neutral white light
- 5000K+: Cool white/blue light
The correct answer is A) 1000K-3000K.
Common Mistake
Confusing color temperature with actual temperature. Higher Kelvin values correspond to cooler colors (more blue), while lower values correspond to warmer colors (more red/yellow).
Q&A
Q: How do I calculate luminance for the contrast ratio formula?
A: Luminance calculation involves converting RGB values to a standardized measure of brightness:
RGB to Luminance Conversion:
- Convert hex to RGB values (0-255 range)
- Normalize RGB values: R/255, G/255, B/255
- Apply gamma correction: If sRGB ≤ 0.03928, then sRGB/12.92, else ((sRGB+0.055)/1.055)^2.4
- Calculate luminance: L = 0.2126*R + 0.7152*G + 0.0722*B
Contrast Ratio:
- Contrast = (L1 + 0.05) / (L2 + 0.05)
- Where L1 is the lighter color and L2 is the darker color
- L1 should always be the lighter luminance value
This standardized approach ensures consistent and accurate contrast calculations across different color combinations.
Q: What's the difference between color harmony and color contrast?
A: Color harmony and color contrast serve different purposes in design:
Color Harmony:
- Focuses on pleasing color combinations
- Creates visual unity and balance
- Uses related colors (analogous, triadic, complementary)
- Applied to overall color schemes
Color Contrast:
- Focuses on differentiation between colors
- Creates visual distinction and hierarchy
- Uses opposing colors on the color wheel
- Applied to ensure readability and accessibility
Relationship:
- Harmony creates cohesion, contrast creates emphasis
- Both are needed for effective design
- High contrast can break harmony if excessive
- Low contrast may lack visual interest
Successful color schemes balance both harmony and contrast appropriately.
Q: How do I choose colors that work well for people with color vision deficiency?
A: Designing for color vision deficiency requires understanding common types and implementing best practices:
Common Types of Color Vision Deficiency:
- Deuteranopia: Difficulty distinguishing green
- Protanopia: Difficulty distinguishing red
- Tritanopia: Difficulty distinguishing blue
- Approximately 8% of men and 0.5% of women have some form of color vision deficiency
Design Strategies:
- Don't rely solely on color to convey information
- Use high contrast ratios (4.5:1 minimum)
- Avoid red-green combinations
- Test color combinations using color blindness simulators
- Provide alternative indicators (patterns, textures, shapes)
Testing Tools:
- Use tools like Coblis or Color Oracle to simulate different types of color blindness
- Check contrast ratios with tools like WebAIM's Contrast Checker
- Test your designs with real users when possible
Creating accessible color schemes benefits everyone, not just those with color vision deficiency.
About
Interior Design Team
This calculator was created by our Construction & Architecture Team , may make errors. Consider checking important information. Updated: April 2026.