Pick a color or type a code and get HEX, RGB, HSL, and a ready-to-paste CSS variable, all at once.
EkZapp's free Color Picker converts any color between HEX, RGB, HSL, and a ready-to-use CSS variable, all updating together instantly. Click the color swatch to open your browser's native color picker, type a HEX code or RGB values directly, or click any swatch from a curated palette of popular web colors — every format updates the moment you change the color.
A common situation this solves: a designer hands you a color as a HEX code, but the codebase you're working in expects RGBA for transparency, or a design tool wants HSL for easy lightness adjustments. Rather than doing the math by hand or searching for a converter formula, you paste the code here and instantly see it translated into every format you might need.
Everything runs client-side using plain JavaScript. Nothing about the color you pick is sent anywhere — the conversion math (HEX to RGB, RGB to HSL, and back) happens locally the instant you interact with the tool, which is why every value updates in real time with no lag.
Beyond one-off conversions, the tool includes a palette of commonly used web design colors you can click to load instantly, plus a formatted CSS custom property you can paste directly into a stylesheet's :root block — covering both the exploratory "what does this color look like in other formats" use case and the practical "I need this in my CSS right now" use case.
See HEX, RGB, HSL, and a CSS variable together, so you never need to convert twice for two different formats.
No account, no limit on conversions — pick and convert as many colors as your project needs.
A curated set of commonly used web colors sits right below the picker — click one to load it instantly.
Convert a designer-provided HEX code into RGBA when you need to add transparency in CSS.
Explore a color in HSL to adjust lightness or saturation while keeping the same base hue.
Match a brand color across different software tools that may expect the code in different formats.
Generate a ready-to-paste CSS custom property for a color used throughout a design system.
Convert a HEX brand color into RGB values needed by a mobile framework's color constructor.
Get RGB values for a color to use in a game engine's material or lighting color properties.
Pick a consistent, accessible color palette for a chart or dashboard and get exact codes for each shade.
Sample a mood-board color and grab its exact code to reuse consistently across a project.
| Task | EkZapp Color Picker | Manual conversion |
|---|---|---|
| Time for one conversion | ✓ Instant | A minute or more with a formula |
| Formats shown at once | ✓ 4 (HEX, RGB, HSL, CSS) | One at a time |
| Visual color picker | ✓ Built in | Not available |
| Risk of calculation error | ✓ None | ✕ Common with HSL math |
| Cost | ✓ Free | Your time |
Click the color preview box to open your browser's native color picker and choose any color visually.
Switch to HEX Input or RGB Input, type your values, and click Convert to load that exact color.
HEX, RGB, HSL, and a CSS variable all update together the moment the color changes.
Click Copy under any format to copy just that code to your clipboard, ready to paste into your project.
A 6-digit base-16 code like #2563EB — the two digits at each position represent red, green, and blue intensity from 00 to FF.
Three numbers from 0-255 like rgb(37, 99, 235) representing red, green, and blue channel intensity — the same color as the HEX example above.
Hue (0-360°), Saturation (0-100%), and Lightness (0-100%) like hsl(221, 83%, 53%) — easier to reason about when adjusting a shade's brightness.
A ready-to-paste custom property declaration like --color: #2563EB; for reuse throughout a stylesheet.
HEX and RGB describe exactly the same underlying color information — they're just two different notations for the same red, green, and blue channel values. HEX packs each channel into a two-digit hexadecimal number, which is compact and easy to copy-paste as a single string; RGB spells the same three numbers out in base-10, which some tools and libraries expect as separate parameters instead of one combined string.
HSL describes color differently — instead of mixing red, green, and blue, it starts from a position on a color wheel (hue), how vivid or muted that color is (saturation), and how light or dark it is (lightness). That structure makes certain design tasks much easier: to create a lighter or darker version of a brand color, you can just change the lightness percentage and keep the same hue and saturation, something that's far less intuitive to do directly in RGB or HEX.
In practice, most projects settle on HEX for storing and communicating brand colors since it's compact and universally recognized, switch to RGBA when transparency is needed, and reach for HSL specifically when programmatically generating color variations like hover states, shades, or tints. Having all three (plus a ready CSS variable) available side by side means you're not stuck manually recalculating whichever format the situation calls for.
The Color Picker is one of more than fifty free tools on EkZapp, sitting alongside a JSON Formatter, Base64/URL Encoder, and other developer utilities. Because all the color math runs as plain JavaScript in your browser, there's no server processing cost involved — the page loads once, and every conversion afterward is essentially free to run, which is exactly why the tool has no usage limit or paywall.
This kind of tool tends to get opened briefly — a quick check of a brand color's RGB equivalent, then straight back to a design file or codebase. That usage pattern is part of why the page stays a single screen with no extra steps: pick or type a color, read off whichever format you need, and copy it.
It also means there's very little that can go wrong. There's no account to lose access to, no history of past colors saved anywhere, and no settings menu to configure before the tool does what you need. Every visit starts from the same default blue, which keeps the tool predictable whether you use it once a year or several times a day.