🔧 Hex to RGB + Luma Calculator
Professional hex color converter that instantly converts hex codes to RGB values and calculates brightness/luma with comprehensive color analysis, multiple format support, and detailed luminance calculations for designers, developers, and color professionals
Hex to RGB + Luma Results:
🎨 Color Conversion Results
Original Hex
rgb(52, 152, 219)Red: 52, Green: 152, Blue: 219
💡 Brightness & Luma Analysis
WCAG standard calculation
Human vision perception
Good for backgrounds
📋 Additional Color Formats
Hue, Saturation, Lightness
Hue, Saturation, Value
✅ Conversion completed using precise color science algorithms
How to Use This Hex to RGB + Luma Calculator
How to Use the Hex to RGB + Luma Calculator:
- Enter your hex color code (e.g., #3498DB, 3498DB, #FFF, or FFF)
- Choose your preferred RGB output format (standard, CSS, percentage, or decimal)
- Select brightness calculation method (relative luminance, perceived brightness, or all)
- Enable additional formats to see HSL, HSV, and other color representations
- For multiple colors, enable batch conversion and enter colors one per line
- Review RGB values, luma calculations, and comprehensive color analysis
- Copy CSS examples for immediate implementation in your projects
Pro Tips: Use relative luminance for accessibility calculations, enable batch mode for color palette analysis, and try high precision for scientific applications!
How It Works
Color Conversion Science & Luminance Calculations:
Our hex to RGB + luma calculator uses precise color science algorithms and industry-standard formulas:
- Hex to RGB Conversion: Parses hexadecimal color codes and converts to red, green, blue values (0-255)
- Relative Luminance: Uses WCAG 2.1 formula with gamma correction for accessibility compliance
- Perceived Brightness: ITU-R BT.709 standard for accurate human vision perception
- Color Space Conversion: Calculates HSL (Hue, Saturation, Lightness) and HSV (Hue, Saturation, Value)
- Brightness Analysis: Multiple calculation methods for different use cases and standards
Technical Features:
- Supports 3-digit (#FFF) and 6-digit (#FFFFFF) hex formats with automatic expansion
- Gamma correction for accurate luminance calculations using sRGB color space
- Multiple RGB output formats for different development and design workflows
- Batch processing with sorting and analysis for entire color palettes
- Precision control from standard (2 decimals) to scientific (6 decimals)
- CSS code generation for immediate implementation in stylesheets
When You Might Need This
- • Convert CSS hex colors to RGB values for JavaScript manipulation and dynamic styling, enabling color animations, theme switching, and programmatic color adjustments
- • Validate color accessibility by calculating luminance values for WCAG compliance, ensuring proper contrast ratios and readable text-background combinations
- • Generate multiple color format outputs for cross-browser compatibility, supporting older browsers that require RGB instead of hex color notation
- • Analyze color brightness for UI design decisions, determining optimal text colors, button states, and visual hierarchy based on scientific luminance calculations
- • Convert design system colors between formats for consistency across platforms, ensuring brand colors work identically in web, mobile, and print applications
- • Create color documentation with comprehensive format support, providing designers and developers with complete color specifications and usage guidelines
- • Understand color properties for digital painting and illustration, using precise luminance values to create proper lighting, shadows, and color harmony in artwork
- • Optimize color palettes for different display technologies, ensuring colors appear consistent across LCD, OLED, and print media with proper brightness calibration
- • Analyze reference colors from photographs and artwork, extracting precise RGB values and brightness information for color matching and reproduction
- • Calculate optimal colors for charts and graphs based on luminance differences, ensuring data visualization elements are distinguishable and accessible to all users
- • Generate color schemes with proper brightness progression for heatmaps, choropleth maps, and other data visualization techniques requiring graduated color scales
- • Validate color choices for scientific visualization, ensuring color-blind accessibility and proper contrast ratios in research publications and presentations
- • Convert art asset colors to game engine formats, ensuring consistent color representation across different rendering pipelines and shader implementations
- • Calculate ambient lighting values using color luminance, creating realistic lighting systems and atmosphere effects based on scientific color properties
- • Optimize UI colors for gameplay visibility, using brightness calculations to ensure interface elements remain readable under various game lighting conditions
- • Analyze color data in research applications, converting between color spaces for accurate measurement and analysis in fields like astronomy, biology, and materials science
- • Calculate precise luminance values for colorimetry and spectroscopy applications, supporting laboratory measurements and quality control processes
- • Convert color standards between different scientific notation systems, ensuring consistency in research documentation and cross-reference compatibility
Frequently Asked Questions
What's the difference between hex and RGB color formats?
Hex colors use hexadecimal notation (#FF5733) where each pair of digits represents red, green, and blue values. RGB uses decimal notation (255, 87, 51) with values from 0-255. Both represent the same colors but in different numbering systems - hex is more compact for web use, while RGB is more intuitive for programming.
What is luma and why is it important for color analysis?
Luma (luminance) measures the perceived brightness of a color based on how the human eye responds to different wavelengths. It's crucial for accessibility (WCAG compliance), determining readable text colors, and creating visually balanced designs. Our calculator provides multiple luminance methods for different standards and use cases.
Can I convert multiple hex colors at once?
Yes! Enable batch conversion and enter multiple hex colors (one per line). The tool will convert all colors simultaneously and can sort results by brightness. This is perfect for analyzing color palettes, design systems, or processing large lists of colors from spreadsheets or design files.
What RGB output formats are supported?
The tool supports standard RGB (255, 87, 51), CSS format rgb(255, 87, 51), percentage format (100%, 34%, 20%), and decimal format (1.0, 0.34, 0.20). Each format is useful for different applications - CSS for web development, decimal for scientific calculations, and percentages for design software.
How accurate are the luminance calculations?
Our calculations use industry-standard formulas: WCAG 2.1 relative luminance with proper gamma correction for accessibility, and ITU-R BT.709 for perceived brightness. Precision can be set from 2 to 6 decimal places. The algorithms follow scientific standards used in professional color management and accessibility testing tools.
What's the difference between the brightness calculation methods?
Relative Luminance (WCAG) uses gamma correction and proper weighting for accessibility compliance. Perceived Brightness (ITU-R BT.709) matches human vision perception for media applications. Simple RGB Average treats all channels equally (less accurate but fast). Choose based on your use case - WCAG for accessibility, ITU-R for visual design.
Does the tool support 3-digit hex codes like #FFF?
Yes! The tool automatically expands 3-digit hex codes (#FFF becomes #FFFFFF, #F0A becomes #FF00AA). This provides full compatibility with all valid CSS hex color formats while maintaining precision in calculations. Both uppercase and lowercase hex digits are supported.
How do I use the results in my CSS or JavaScript code?
The tool generates ready-to-use CSS examples and provides multiple format options. For CSS, use the generated rgb() values directly. For JavaScript, use the comma-separated RGB values for color manipulation, canvas operations, or dynamic styling. All formats are copy-paste ready with proper syntax.