To get a hex color code online, open a color picker tool, click or drag the selector to your target color, and copy the six-character hex value. For example, #3B82F6 is a medium blue. No software installation is required, and the whole thing takes under ten seconds in any browser.
What Is a Hex Color Code?
A hex color code is a six-character string preceded by a # symbol, such as #FF5733. Each pair of characters represents one color channel: the first two are red, the middle two are green, the last two are blue. The scale runs from 00 (none) to FF (maximum), written in base-16 notation.
For reference: #FF0000 is pure red, #00FF00 is pure green, #0000FF is pure blue, #000000 is black, and #FFFFFF is white. Once you see the pattern, you can roughly predict a color from its code before rendering it. High values across all three pairs will be near white; low values across all three will be near black.
Hex codes are the standard in web development. Browsers, CSS, Figma, and Canva all accept them directly. According to MDN Web Docs, hex color notation has been part of CSS since the earliest versions of the specification.
Hex vs. RGB vs. HSL — What Is the Difference?
Open any color picker and you will see three output formats. Here is when each one matters.
Hex (#3B82F6) is the shortest notation and the default for HTML, CSS, and most design tools. Easy to copy and paste anywhere.
RGB (rgb(59, 130, 246)) expresses the same color as decimal numbers. RGB is the right choice when writing CSS that needs transparency, like rgba(59, 130, 246, 0.5) for a 50% transparent overlay. Hex cannot handle transparency without an 8-digit extension.
HSL (hsl(217, 91%, 60%)) stands for Hue, Saturation, and Lightness. Hue is a degree on the color wheel (0-360), saturation is how vivid the color is, and lightness is how bright. It is the most readable of the three: to make a color 20% lighter, you raise the L value rather than recalculating red, green, and blue separately.
An online color picker lets you input any color and see its hex, RGB, and HSL values without opening Photoshop or Figma. You can try this directly using the color picker on Atoolin, which shows all three formats side by side and updates as you drag the selector.
How to Get Any Color's Hex Code Online
Getting a hex code takes three steps:
- Open a color picker in your browser.
- Drag the hue slider and the saturation/brightness selector, or type a starting value if you already know part of the code.
- Click the hex field to copy the result.
If you are matching a color from an image or screenshot, the process differs slightly. Use a color picker with image upload or eyedropper support, hover over the pixel you want, and read the value. The eyedropper approach takes under 30 seconds and gives exact results. Searching for "brand name hex code" online is less reliable because outdated values are common, especially after rebrands.
Hex Color Codes for Designers
Why Designers Rely on Hex Codes
Telling a developer to "make that button teal" produces inconsistent results. Handing over #0D9488 removes the ambiguity. The color is the same in every browser and at every screen density.
Design systems store hex codes as named tokens. A team might define brand-primary: #0D9488 in a shared stylesheet, and every component references that token. One value change propagates across the entire product. This approach catches color inconsistencies early. Mismatched shades are one of the most common UI review findings before token systems are in place.
Figma, Sketch, and Adobe XD all display hex values in their color panels by default. No conversion needed when handing off to a developer.
Common Hex Codes to Know
| Color name | Hex code | Common use |
|---|---|---|
| Pure white | #FFFFFF |
Backgrounds, text on dark |
| Pure black | #000000 |
Body text, borders |
| Medium blue | #3B82F6 |
Buttons, links (Tailwind blue-500) |
| Teal | #0D9488 |
Accent colors (Tailwind teal-600) |
| Red | #EF4444 |
Error states (Tailwind red-500) |
| Light gray | #F3F4F6 |
Card backgrounds (Tailwind gray-100) |
Color Picker for Social Media Matching
Matching Brand Colors Across Platforms
Social media platforms publish official hex codes for their logos. Using the exact value ensures graphics you produce for Instagram, LinkedIn, or YouTube look right when placed next to platform UI elements.
Some current platform codes: Facebook blue is #1877F2, LinkedIn blue is #0A66C2, YouTube red is #FF0000, and X (formerly Twitter) uses #000000 for its current identity. Spotify green is #1ED760.
The problem is that brand guidelines update. Multiple design blogs still list Twitter's old blue (#1DA1F2) months after the rebrand. Rather than trusting a static list, sample the color directly from an official screenshot or the platform's current homepage using a color picker. That gives you the actual value.
Keeping Colors Consistent Across Formats
When producing graphics for multiple platforms — a YouTube banner, an Instagram post, a blog thumbnail — you export at different sizes but need the same colors throughout. A saved hex code is the anchor. One app mixed the color; the hex value lets any other app reproduce it exactly.
If a client gives you a PANTONE swatch instead of a hex code, use a PANTONE-to-hex conversion reference. The result is approximate. PANTONE is a print standard; hex is screen-based, and the same code can look different on displays with different color profiles.
FAQ
What does the # symbol mean in a hex color code?
The # is a prefix, not a mathematical symbol. It tells browsers, CSS parsers, and design tools that the six characters following it represent a hex color value. Some tools accept the code without the #, but including it is standard and prevents parsing errors.
Can I get a hex code from a photo or screenshot?
Yes. Use a color picker with image upload or eyedropper support. Upload the image, hover over the pixel you want, and the tool returns the hex, RGB, and HSL values for that pixel. It reads the actual stored value, so the result is exact rather than estimated.
Why does the same color look different on my phone and my computer?
Screens render colors differently based on hardware, firmware, and color profile. A hex code like #3B82F6 defines the same mathematical value on every device, but a wide-gamut display (such as one using Apple's Display P3 profile) may show a more saturated version than an older sRGB monitor. For most web and social media work, the difference is small enough to ignore.