What is Color Picker?
Translating colors between HEX, RGB, and HSL formats is a daily chore for UI developers. Our local Color Picker provides a native visual interface that instantly computes and converts color values in real-time, completely offline.
Before you use this tool
Start with a small, representative example and check the result before you rely on it in a larger workflow. Keep the original data and look closely at the edge cases. The safest tool is the one whose limits you understand.
Deep Dive: Color Picker
Related Articles
Learn more about this tool and related topics in our blog.
“”
Azeem Mustafa
Privacy Architect
Core Capabilities
- Interactive visual color spectrum and saturation map
- Bidirectional HEX, RGB, HSL, and CMYK conversion
- Perception-weighted Tint and Shade generation
- Alpha transparency (RGBA/HSLA) support
- Real-time CSS variable and code snippet generation
- History panel for recent color selections
- High-contrast "Light/Dark" mode detection
- locally processed and private: no data transmission or cloud logging
Why It Matters
- Precision: Get exact numerical coordinates for any color.
- Aesthetics: Build visually balanced palettes with perceptual math.
- Efficiency: Switch between web and print formats in one click.
- Privacy: Keep your proprietary brand identities off the cloud.
- Reliability: Trust in standards-compliant color transformations.
Quick Start Guide
Explore the Spectrum: Use the interactive visual map to find your base hue. Watch the values update in real-time as you drag the cursor across the canvas.
Shift Between Systems: Monitor the HEX, RGB, and HSL values simultaneously. This provides instant numerical context for your chosen color across different platforms.
Generate Matching Shades: Check the "Tints and Shades" panel to see 10 variations of your color. We use perceptual math to ensure they all feel like they belong to the same family.
Fine-Tune for Printing: Toggle the CMYK view to see how your web color will translate to physical ink. Perfect for brand designers preparing business card or poster assets.
Copy CSS Variables: Grab the ready-to-use CSS output for your project. We handle the formatting (e.g., `rgb(255, 0, 0)`) so you don’t have to.
Lock Your Favorites: Temporary click to "stow" colors during your session. Compare them side-by-side to ensure your UI elements have sufficient contrast.
Usage Examples
HEX to RGB conversion
Scenario 01Split #FF5733 into its red, green, and blue parts.
#FF5733
rgb(255, 87, 51) - FF=255, 57=87, 33=51
HEX to HSL conversion
Scenario 02Describe the same color by hue, saturation, and lightness.
#FF5733 (rgb 255, 87, 51)
hsl(9, 100%, 60%) - hue 9deg, fully vivid, mid light
Contrast check example
Scenario 03Dark text on a light background and the resulting ratio.
text #16221E on background #EFF1EF
contrast ratio about 13.7 to 1 - passes WCAG AA and AAA
Three digit shorthand
Scenario 04A short HEX repeats each digit to form the full code.
#F73
#FF7733 = rgb(255, 119, 51)
Common Scenarios
Website Design Color Match
Match exact brand colors across formats.
Print Design (RGB to CMYK)
Convert screen colors for printing.
Generate Button Hover States
Create darker or lighter versions of a brand color.
Accessibility Color Contrast
Ensure text is readable on backgrounds.
Data Visualization Palettes
Build chart colors that stay distinct.
UI Theme Tokens
Define a small set of theme colors.
Pull a color from a photo
Match a real world color exactly.
Social post backgrounds
Quick cohesive colors for graphics.
Questions?
Technical Architecture
sRGB is the shared space
sRGB (standard RGB) was proposed by HP and Microsoft in 1996 and became the international standard IEC 61966-2-1:1999. It is the default color space the web assumes when no profile is attached, which is why HEX, RGB, and HSL values stay consistent across browsers and devices. Every format shown here describes a color inside sRGB.
How HEX maps to RGB
A six digit HEX is three byte pairs in base 16. The first pair is red, the second is green, the third is blue, each ranging from 00 to FF (0 to 255 in decimal). So #FF5733 means red 255, green 87, blue 51. A three digit form like #F73 expands by repeating each digit to #FF7733.
The HSL math
To move from RGB to HSL, first normalize the channels to 0 to 1. Find the maximum and minimum, then set lightness to their average. Saturation depends on how far apart they are. Hue comes from which channel is largest: red gives 0 or 360, green gives 120, blue gives 240, with the others interpolated between. The reverse works by walking the hue around the wheel.
Local only by design
Picking and conversion run entirely in your browser with JavaScript. No color, image, or palette is uploaded to a server. This keeps proprietary brand work on your device and lets the tool keep working offline after the first load.
WCAG contrast ratio
The ratio comes from relative luminance: (L1 + 0.05) divided by (L2 + 0.05), where L1 is the lighter color. WCAG 2.1 asks for at least 4.5 to 1 on normal text and 3 to 1 on large text, with 7 to 1 as the AAA target for normal text. Luminance is weighted toward green, which is why pure green looks brighter than pure blue.
CMYK is an approximation
CMYK ink covers a smaller gamut than sRGB light. Converting screen colors to print uses a subtractive model, and some vivid RGB colors have no exact CMYK match. The tool returns the closest printable values, not a perfect one, so a test print still matters.
max per RGB channel
0 to FF hex
hue degrees
color wheel
WCAG AA text
normal text min
sRGB standard year
IEC 61966-2-1
All four describe the same sRGB color. The difference is which is easiest to read, edit, or print.
| Feature | HEX | RGB | HSL | CMYK |
|---|---|---|---|---|
| Where it is used | CSS, web | Screens | Design tools | Printing |
| Easy to type | ||||
| Supports transparency | ||||
| Good for print | ||||
| Intuitive to adjust |
Pick a color
wheel or image
Convert
HEX RGB HSL
Check contrast
WCAG ratio
Copy code
to clipboard
Why the same color wears different clothes
A screen color is a point in a space, not a single string of text. HEX, RGB, and HSL are just three ways to name that point. The MDN CSS color values guide puts it plainly: a defined color model lets a color look the same wherever it is rendered. When you convert here, the point does not move. Only the address changes.
That shared address book is sRGB. It was standardized as IEC 61966-2-1 and remains the default space the web assumes. Learn more from the W3C sRGB note and the ICC sRGB registry. Knowing this stops the common panic of "my color changed" when really it was only relabeled.
Contrast is the part that actually matters
Pretty palettes fail real users when the text cannot be read. The WCAG contrast minimum explanation shows the 4.5 to 1 rule was chosen for people with aging eyes and color vision deficiencies, not as an arbitrary bar. Luminance, not hue, carries most of the readability, which is why a red green color blind user can still read high contrast text.
If you want a deeper read on the math, the MDN colors and luminance guide walks through how browsers compute the ratio. And for choosing image formats that pair well with your palette work, our best image formats guide for 2026 is a useful next step.
Related tools and reading
Colors often travel with other numbers. When you need to shift between number bases by hand, the base converter explains how hexadecimal maps to decimal, the exact step behind every HEX to RGB change. If your palette is headed for the web as files, the image compressor keeps those assets small without leaving your device.
For the privacy side of why local only tools matter, read our client side processing and privacy guide. You can always come back to the color picker to test another shade.
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Founder & Lead Developer at FileMint
Building privacy-first browser tools powered by WebAssembly. Focused on making file processing fast, secure, and accessible — without ever uploading your data to a server.
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