You're Designing a Website and Your Design Tool Uses RGB but Your CSS Requires Hex Codes
A designer hands you a color palette with RGB values (255, 128, 0), but your website stylesheet needs hex codes. You found a beautiful color (#3498db) online, but your design software only accepts RGB input. You're trying to match a color from a printed swatch to web colors and need to convert between HSL, RGB, and hex. Converting color formats accurately is essential for designers, developers, and anyone working across tools and platforms. Our color converter translates instantly between all formats.
What This Calculator Does
This color converter translates between all major color formats: hexadecimal color codes (hex, like #FF0000), RGB values (red/green/blue, like RGB(255,0,0)), and HSL values (hue/saturation/lightness). Select your source color format and enter the color value. Get instant conversions to every other format. This is essential for web designers, developers, graphic designers, and anyone working with digital color across different tools and applications.
How to Use This Calculator
You can enter a color value in any format. For hex, type the code (with or without the #). For RGB, input the three values (0–255 each). For HSL, input hue (0–360°), saturation (0–100%), and lightness (0–100%). The converter displays the color visually and shows all equivalent formats instantly. Use this when switching between design tools, coding websites, or communicating colors with other designers and developers.
Bookmark this tool if you work with web design or digital color regularly. Many professionals keep a color converter open while working across multiple tools.
The Math Behind the Conversion
Color conversion involves mathematical relationships between different color spaces. Each format represents the same color information in a different way.
Hex to RGB conversion:
Hexadecimal uses base-16 (0–9, then A–F). Hex color codes have three pairs of digits representing red, green, and blue intensity from 00 (minimum) to FF (maximum).
Example: #FF0000
RGB to Hex conversion:
Reverse the process. Convert each decimal value (0–255) to hexadecimal (00–FF).
Example: RGB(0, 255, 0)
HSL to RGB conversion (more complex):
HSL uses perceptual color dimensions: Hue (the color itself, 0–360°), Saturation (color intensity, 0–100%), and Lightness (brightness, 0–100%).
Basic principles:
The conversion formula involves calculating intermediate values based on lightness and saturation, then using the hue to determine RGB values. The exact formula is complex but built into most tools.
Worked example: Convert #3498DB (a popular blue) to RGB:
Convert RGB(52, 152, 219) to HSL (approximately):
Our color converter handles all of this instantly-but now you know the math behind it.
Web Design and Development
Developers and designers work across tools daily. A designer provides colors as RGB values from Figma or Photoshop. You're coding HTML/CSS and need hex codes. You're updating brand colors and need to ensure consistency across web and print. The color converter ensures you're using the correct equivalent format everywhere. Mistakes here lead to mismatched brand colors and poor visual consistency.
Graphic Design and Print Preparation
Graphic designers often work in RGB (for screen-based design) but need to convert to other formats for print or web export. HSL is intuitive for designers-"I want a darker version of this color" means decreasing lightness. Converting between formats helps designers adjust colors systematically. A designer matching brand colors across media needs accurate conversions.
Branding and Color Management
Brand teams maintain color palettes across print, web, and physical products. A brand color might be defined in hex for web (#2E86AB), in CMYK for print, and in Pantone for physical items. The color converter ensures web implementations match the intended brand color. Consistency is critical for brand recognition and professional appearance.
Common Conversion Reference
Here are colors you'll encounter constantly in design:
Basic colors:
Popular web colors:
Quick facts:
Frequently Asked Questions
Why are there so many color formats?
Different tools and industries developed different standards. RGB is intuitive for screens and how screens work (red, green, blue light). HSL is intuitive for designers (hue = color, saturation = intensity, lightness = brightness). Hex is compact for code. CMYK is for print. They all represent the same color information differently.
What's the difference between RGB and hex?
They represent the same color in different ways. RGB uses decimal numbers (0–255), while hex uses hexadecimal (00–FF). They're mathematically equivalent-RGB(255, 0, 0) and #FF0000 are exactly the same red. Use hex in code, RGB in design tools.
Why is HSL useful for designers?
HSL matches how designers think about color. "Make this color darker" = decrease lightness. "Make this more vibrant" = increase saturation. "Shift to a blue tone" = change hue. RGB doesn't work intuitively that way-changing individual RGB values unpredictably shifts color. HSL is more natural for color manipulation.
What's the difference between RGB and CMYK?
RGB is for screens (how light is generated). CMYK is for print (how inks mix). They're different color spaces because screens use light and printers use pigment. A bright neon RGB color might not be reproducible in CMYK. For screen-based work, use RGB. For print, use CMYK. The color converter focuses on digital formats (hex, RGB, HSL).
Can I use any color hex code in web design?
Yes, modern browsers support millions of colors. Some older browsers might not display all colors, but for contemporary design, use any 6-digit hex code. You can also use 3-digit hex shorthand (#F00 instead of #FF0000), named colors (red, blue, etc.), or rgb() and hsl() functions in CSS.
How do I pick colors that work well together?
Use color theory principles: complementary colors (opposite on the color wheel), analogous colors (next to each other), or triadic (evenly spaced). The hue value in HSL helps-complementary hues are about 180° apart. Tools like Color Hunt or Coolors generate palettes. Once you have color inspiration, use the color converter to get all necessary formats.
Related Calculators
Pair the color converter with design tools for complete color work. While we don't have a dedicated color theory calculator, the color converter connects well with other design and technical tools. If you're working with images or need to extract colors, use external color picker tools. The color converter ensures all your color formats are consistent and accurate across your project. For web developers, keep this tool bookmarked during CSS and HTML work.