What Is a Color Picker
A color picker is a tool that helps you select, identify, and convert colors for use in web design, graphic design, and development. Instead of guessing color codes by eye or memorizing hex values, a color picker lets you work with colors visually and get exact codes you can paste directly into your CSS, HTML, or design software.
ToolChemy offers four specialized color picker tools, each designed for a different workflow. All of them run entirely in your browser - your images and data are never uploaded to any server.
Choosing the Right Color Picker Tool
Each of our color picker tools serves a different purpose. Here is when to use each one:
Color Picker from Image
Use the color picker from image when you need to extract colors from a photograph, screenshot, logo, or any visual reference. Upload your image, click on any pixel, and get the exact color in HEX, RGB, and HSL. This is ideal for matching a website's color scheme to a brand photo, building palettes from inspiration images, or identifying specific colors in artwork.
HTML Color Picker
Use the HTML color picker when you want to select a color visually and get ready-to-use CSS code. The tool shows color harmonies (complementary, triadic, analogous) to help you build cohesive color schemes. This is the go-to tool for web developers and designers who need to pick colors from scratch for a new project.
Hex Color Picker
Use the hex color picker when you already have a hex code and want to preview it, convert it to RGB or HSL, or find related colors. The tool includes a reference table of the most popular named CSS colors with their hex codes. This is useful when working with existing brand guidelines or when you know the approximate color you want.
RGB Color Picker
Use the RGB color picker when you want precise channel-by-channel control with red, green, and blue sliders. It is useful for UI design, CSS debugging, digital art workflows, and any situation where you need to fine-tune additive screen colors numerically before copying the result to HEX or HSL.
Understanding Color Formats
Web colors can be expressed in several formats. Understanding the differences helps you choose the right one for your context:
- HEX (#FF5733): A six-character hexadecimal code. The most common format in CSS and HTML. Compact and widely supported. Each pair of characters represents red, green, and blue intensity.
- RGB (rgb(255, 87, 51)): Three decimal numbers from 0-255 representing red, green, and blue channels. Maps directly to how screens display color. Easy to manipulate programmatically.
- HSL (hsl(14, 100%, 60%)): Hue (0-360 degrees), saturation (0-100%), and lightness (0-100%). More intuitive for humans because you can easily create lighter, darker, or more muted versions of a color by adjusting one value.
All three formats represent the same colors — they are just different notations. Our color picker tools show all three simultaneously so you can copy whichever format your project needs.
Color Theory Basics for Web Design
Working with colors effectively goes beyond just picking values. A few fundamental concepts from color theory can help you make better design decisions:
Color Harmony
Color harmonies are combinations that look visually pleasing based on their positions on the color wheel. The most common harmonies are:
- Complementary: Colors opposite each other on the wheel (180 degrees apart). High contrast, vibrant combinations.
- Analogous: Colors adjacent on the wheel (30 degrees apart). Harmonious, subtle combinations.
- Triadic: Three colors evenly spaced (120 degrees apart). Balanced, colorful combinations.
Contrast and Accessibility
When choosing colors for text and backgrounds, contrast is critical. The Web Content Accessibility Guidelines (WCAG) require a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Using a color picker to identify exact values helps you verify that your color choices meet these accessibility standards.
If you already know the workflow you need, start with our color picker from image for sampling existing visuals, the HTML color picker for building new palettes, the hex color picker for code-based work, or the RGB color picker for channel-by-channel adjustments. For adjacent workflows, you can pair these with our calculator tools or text to speech tools.