#6366F1 Indigo
#
239°
84%
67%
RGB99, 102, 241
HSL239°, 84%, 67%
CMYK59%, 58%, 0%, 5%
HSV239°, 59%, 95%
Saved Colors

Drag items to reorder · Click a swatch to use · Click hex code to copy

Vision Simulator

Preview how your active color appears to users with color vision deficiencies.

Normal VisionTrichromacy
ProtanopiaRed-blind (1% of males)
DeuteranopiaGreen-blind (5% of males)
TritanopiaBlue-blind (Rare)
AchromatopsiaMonochromacy (Very rare)
WCAG Contrast Matrix

Contrast against standard web backgrounds.

White BG (#FFF)----
Black BG (#000)----
Extract Colors from Image
🖼️ Upload an image to pick & extract
#FFFFFF
CSS Gradient Generator
90°
background: linear-gradient(90deg, #6366f1, #a855f7);
Color System Builder

Mathematical harmonies based on your active color.

Export Options

Download or copy your saved palette formats.

ChromaBase Pro: The Ultimate Free Color Palette Generator & Accessibility Toolkit

In the modern landscape of web development, UI/UX design, and digital branding, color is not just a visual choice—it is a critical communication tool. The colors you choose dictate user psychology, brand trust, and most importantly, digital accessibility. However, finding the perfect color palette, ensuring it passes strict WCAG accessibility guidelines, and exporting it seamlessly into your codebase has historically required juggling five different websites and expensive desktop software.

Enter ChromaBase Pro Tools. We have engineered the most comprehensive, browser-based color architecture system on the internet. Whether you need to extract the dominant hex codes from a reference image, build a 10-step Tailwind CSS color scale, simulate how a colorblind user views your website, or generate complex CSS gradients, ChromaBase does it all in one unified, lightning-fast dashboard.

The Client-Side Privacy Guarantee: Unlike other color tools that force you to upload your proprietary brand images to remote servers, ChromaBase is built on a 100% client-side architecture. When you use the Image Extractor or save a palette, the mathematical processing happens directly inside your device's RAM. Zero server uploads. Zero data retention. Total creative privacy.

Step-by-Step Guide to Mastering ChromaBase

ChromaBase is designed to follow your natural creative workflow. Below is a detailed breakdown of every feature within the suite and how to leverage them to build breathtaking, highly accessible color systems.

1. The Core Color Generator

The foundation of any great design system starts with a single base color. The Generator tab is your control center for exploring and defining that exact shade.

  • The Massive Display: As you tweak colors, the massive preview window updates instantly, providing dynamic text contrast (automatically switching between black and white text) so you can immediately gauge readability.
  • Precision Input: Already have a brand color? Paste your Hex code directly into the input field. The engine instantly calculates the exact RGB, HSL, CMYK (for print), and HSV values, allowing one-click copying for your CSS or design files.
  • Interactive HSL Sliders: Unlike standard color pickers, our sliders are based on the HSL (Hue, Saturation, Lightness) color model, which is far more intuitive for human perception. Drag the Lightness slider to instantly create a dark-mode variant, or drop the Saturation for a muted, pastel aesthetic.
  • Screen Eye Dropper: Using the native Web EyeDropper API (on supported browsers), you can click the "Pick from Screen" button to grab any color visible anywhere on your computer monitor—perfect for pulling inspiration from a webpage or a YouTube video.

2. The Palette Manager

As you discover beautiful colors, simply press the Spacebar or click the "+" button to save them to your personal Palette.

The Palette Manager is a fully interactive canvas. You can drag and drop your color swatches to rearrange them, establishing visual hierarchy (e.g., Primary, Secondary, Accent, Background). If your palette becomes cluttered, use the "Sort by Hue" button to mathematically organize your colors into a beautiful, flowing rainbow, making it much easier to identify missing shades in your design system.

3. Vision Simulator & Accessibility (A11y)

Designing for accessibility is no longer optional; it is a legal and ethical requirement. Over 300 million people globally experience some form of color vision deficiency (CVD). ChromaBase ensures your designs are inclusive.

  • Live Vision Simulation: As you select a color, the tool uses complex matrix math to simulate exactly how that color appears to users with Protanopia (Red-blind), Deuteranopia (Green-blind), Tritanopia (Blue-blind), and Achromatopsia (Total color blindness). If two of your brand colors look identical under the Protanopia filter, you know you need to adjust their lightness to ensure contrast.
  • WCAG Contrast Matrix: The tool automatically calculates the relative luminance of your active color against pure white (#FFFFFF) and pure black (#000000). It displays the exact contrast ratio (e.g., 4.5:1) and grades it against the Web Content Accessibility Guidelines (WCAG). You will instantly know if your color gets a "Pass (AA/AAA)" or a "Fail" for text readability.
  • Full Palette Grid: Click the "Check Full Palette Grid" button to cross-reference every single color in your saved palette against each other. This generates a matrix showing you exactly which colors can be safely layered on top of one another (e.g., using your Accent color as text over your Primary background).

4. Image Color Extractor

Often, the best color palettes are found in nature, photography, or mood boards. The Image Extractor allows you to upload any reference photo to pull colors directly from the pixels.

Hover over your uploaded image to activate the precision magnifying glass. You can choose your sampling size: a pinpoint 1px sample for exact detail, or a 5px average to get a smooth, representative color from a textured area.

Need a palette instantly? Click the "Auto-Extract Top Colors" button. Our algorithm scans every pixel in the image, clusters them by visual similarity, filters out muddy grays, and automatically generates a stunning 6-color palette based on the image's dominant hues.

5. CSS Gradient Generator

Flat colors are great, but modern web design thrives on depth. The Gradient tab allows you to blend two of your palette colors together to create smooth transitions.

You can toggle between Linear and Radial gradients, and use the interactive slider to rotate the angle of the blend (from 0° to 360°). Most importantly, the tool generates pristine, production-ready `background: linear-gradient(...)` CSS code that you can copy to your clipboard with a single click.

6. Color System Builder (Harmonies & Scales)

If you have a Primary brand color but don't know what colors to pair it with, the Harmony builder uses traditional color wheel physics to generate perfect matches:

  • Complementary: Finds the exact opposite color on the wheel (180°), perfect for high-contrast call-to-action buttons.
  • Analogous: Generates neighboring colors (e.g., mixing Blue with Teal and Indigo) for a smooth, unified aesthetic.
  • Triadic & Split Complementary: Complex mathematical pairings used by professional illustrators for vibrant, balanced designs.
  • 10-Step Lightness Scale: This is a game-changer for UI developers. It takes your base color and generates a perfect 10-step scale (from 5% lightness to 95% lightness). This gives you the exact hex codes you need for hover states, active states, borders, and dark mode backgrounds.

7. Professional Export Options

A color palette is useless if you can't implement it. Once your palette is perfected, ChromaBase offers the most robust export options available online:

  • Tailwind Config: Instantly generates the exact JavaScript object needed to paste into your `tailwind.config.js` file.
  • CSS & SCSS Variables: Generates a `:root` block or SCSS variables so you can drop your design system directly into your stylesheet.
  • JSON Data: Exports a structured JSON file containing all your hex codes, perfect for importing into design tokens or passing to an API.
  • PNG Image: Renders a beautiful, high-resolution visual swatch sheet of your palette to share on Dribbble, Behance, or with clients.
  • PDF Report: Generates a professional, printable document detailing your brand colors for corporate style guides.

Advantages of Using ChromaBase Pro

Why should front-end developers, graphic designers, and digital marketers make ChromaBase their default color tool?

  • Zero Friction: There are no sign-ups, no account creations, and no premium paywalls. The tool loads instantly and is ready to use.
  • Developer-Centric: While other tools just give you a hex code, ChromaBase understands that developers need CSS gradients, Tailwind configs, and WCAG contrast ratios to actually do their jobs.
  • Persistent Local Storage: If you accidentally close your browser tab, don't panic. ChromaBase utilizes your browser's `localStorage` to remember your palette. When you return, your colors will be exactly where you left them.
  • Responsive Design: Inspiration strikes anywhere. ChromaBase is meticulously coded to work flawlessly on desktop monitors, iPads, and mobile smartphones alike.

Primary Use Cases

  • UI/UX Designers: Building cohesive design systems, ensuring text readability, and generating dark-mode color scales.
  • Front-End Developers: Translating a Figma design into raw CSS variables or Tailwind utility classes instantly.
  • Brand Marketers: Extracting exact brand colors from a company logo to ensure consistency across social media posts and email campaigns.
  • Digital Artists & Illustrators: Using the mathematical harmony generator to find the perfect shading and highlight colors for a digital painting.

Frequently Asked Questions

Yes. ChromaBase Pro is a 100% free web utility. There are no subscription fees, no locked features, and no account registrations required to use the export tools or image extractors.
Absolutely. ChromaBase operates on a client-side architecture. When you upload an image, it is drawn onto an HTML5 canvas directly within your web browser's memory. Your images are never sent to, stored on, or seen by our servers.
WCAG stands for Web Content Accessibility Guidelines. It is the international standard for web accessibility. ChromaBase calculates the contrast ratio between your colors to ensure visually impaired users can read the text on your website, aiming for the standard AA (4.5:1) or AAA (7:1) passing grades.
The 10-Step scale generates tints and shades of your base color. In UI design, the middle color (55%) is your primary button. The lighter colors (85-95%) are used for subtle backgrounds or disabled states, while the darker colors (15-25%) are used for hover states, borders, or dark-mode UI elements.
RGB (Red, Green, Blue) is how digital screens display color. HSL (Hue, Saturation, Lightness) is a human-friendly way to adjust digital colors. CMYK (Cyan, Magenta, Yellow, Black) is the ink-based color model used for physical printing (like business cards or flyers).
When clicked, our algorithm scans the pixel data of your uploaded image, clusters visually similar pixels together, filters out extreme whites and blacks, and identifies the 6 most prominent and vibrant colors, automatically adding them to your palette.
Once your palette is built, go to the Export tab and click "Tailwind Config". It will copy a properly formatted JavaScript snippet to your clipboard. You simply paste this into the `theme.extend.colors` section of your `tailwind.config.js` file in your project.
ChromaBase simulates how specific, individual colors appear to users with different types of color vision deficiencies (like Protanopia). To test an entire live website, you would need to use a browser extension, but ChromaBase ensures your base colors are safe before you build the site.
No. ChromaBase uses your browser's local storage to automatically save your palette in real-time. If you close the tab and return later, your saved swatches will still be there. (Note: clearing your browser cache will delete the palette).
The "Pick from Screen" button utilizes the native Web EyeDropper API. Currently, this API is only supported on Chromium-based desktop browsers (like Google Chrome, Microsoft Edge, and Opera). It does not work on Firefox, Safari, or mobile devices.
Complementary colors sit exactly 180 degrees opposite of each other on the color wheel (e.g., Blue and Orange, or Red and Green). They create maximum visual contrast, making them perfect for call-to-action buttons or notification badges.
Yes! The Palette Manager supports drag-and-drop. Simply click and hold the drag handle (the dotted icon) next to any color, and drag it up or down to reorganize your design system hierarchy.
A Linear gradient transitions colors in a straight line (which you can control via the rotation angle slider). A Radial gradient transitions colors outward from a central focal point in a circular shape.
If you have saved dozens of random colors, the "Sort by Hue" button mathematically reorganizes them based on their position on the color wheel (Reds, then Oranges, then Yellows, Greens, Blues, Purples). This creates a neat, organized rainbow scale.
In the Palette tab, click the red "Clear All" button at the top right. A confirmation prompt will appear to ensure you don't accidentally delete your work. Once confirmed, your palette is permanently wiped.
The Full Palette Grid is an advanced tool that cross-references every color in your saved palette against every other color. It generates a large table showing the exact contrast ratio between any two colors, helping you decide which colors can be safely used as text over a specific background.
Yes. In the Export tab, click the "PNG Image" button. The tool will use HTML5 Canvas to instantly draw a beautiful, high-resolution presentation image containing all your color swatches and their hex codes, which downloads automatically.
Yes. In the Export tab, you can choose "SCSS Variables". This will format your palette using standard SASS variable syntax (e.g., `$color-1: #6366f1;`) ready to be pasted into your `.scss` files.
By default, the Image Extractor uses a "3px Average" sampling size. This means it takes the pixel you clicked on, plus the surrounding pixels, and blends them into an average color to avoid picking up tiny digital artifacts or noise. You can change this to "1px Point" in the dropdown for exact pixel matching.
These are the two most common forms of red-green color blindness. Protanopia is a reduced sensitivity to red light, while Deuteranopia is a reduced sensitivity to green light. Our Vision Simulator shows you how your UI looks to people with these conditions, ensuring your designs don't rely solely on red/green color cues.