Hex Color Converter
Convert between HEX, RGB, HSL, and HSV color formats. Preview the color and get values for CSS, design, and development.
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How to use this calculator
Colors can be expressed in multiple equivalent formats. HEX uses base-16; RGB uses decimal 0–255.
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Enter RGB values (0–255 for each channel).
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The calculator converts to HEX, HSL, and HSV automatically.
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Use the HEX value in CSS, HSL for adjusting lightness/saturation, and RGB for image editing.
Frequently asked questions
What does each color format mean?
RGB: amount of Red, Green, Blue light (0–255). HEX: the same in base-16 (00–FF). HSL: Hue (color wheel angle 0–360°), Saturation (0–100%), Lightness (0–100%). HSV: Hue, Saturation, Value (brightness). HSL and HSV are easier to work with for adjusting colors systematically.
How do I convert HEX to RGB manually?
Split the HEX code into three pairs: #6366F1 → 63, 66, F1. Convert each pair from base-16 to decimal: 0x63 = 99, 0x66 = 102, 0xF1 = 241. So rgb(99, 102, 241).
What is the difference between HSL and HSV?
Both use hue and saturation. L (lightness): 50% = pure color, 0% = black, 100% = white. V (value/brightness): 100% = pure color or white, 0% = black. HSL is more intuitive for web design; HSV is used in many image editors (Photoshop's color picker).
What does opacity/alpha add?
RGBA adds a fourth channel (alpha, 0–1): rgba(99, 102, 241, 0.5) is 50% transparent. HSLA does the same for HSL. In CSS, you can also use hex with an alpha channel: #6366F180 (last two hex digits = 50% opacity = 0x80 = 128/255).
Color format conversions for designers and developers
How to use the hex color
This hex color gives you instant, accurate results — no registration or download required. Enter your values above and get your result in seconds. The tool is free, works on all devices, and keeps your data private — nothing is stored or shared.
How the hex color works
The hex color converter uses standard formulas used in mathematics, science, and engineering. Enter your inputs, and the tool calculates the result instantly in your browser. No server-side processing means your data stays on your device. Results update in real time as you change inputs.
When to use each color format
Use HEX for web design and CSS (universal browser support, compact notation). Use RGB when working with image processing, canvas APIs, or blending calculations. Use HSL when you need to adjust color programmatically — changing lightness from 40% to 60% is intuitive in HSL, painful in RGB.
Color contrast and accessibility
WCAG 2.1 requires a minimum contrast ratio of 4.5:1 for normal text against background. Contrast ratio = (L1 + 0.05) / (L2 + 0.05), where L is relative luminance computed from RGB. Tools like the WebAIM Contrast Checker use these formulas. High contrast is critical for users with visual impairments.
CSS color keywords and modern formats
CSS supports 140+ named colors (red, coral, steelblue), hex (#RRGGBB or shorthand #RGB), rgb(), hsl(), and modern oklch() and lab() formats. The oklch format is perceptually uniform — equal steps in lightness/chroma look equal to the human eye, unlike RGB where equal steps do not.
Hex color: how it works
Built on well-established mathematical principles, this tool delivers accurate results for students, researchers, and professionals. Enter your values and get instant clarity without specialist software or manual arithmetic.
Who uses this tool?
Teachers, students, engineers, and data analysts use it to verify calculations, check homework, and solve problems faster. It is intuitive enough for beginners while comprehensive enough for professional use.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →