What color formats can I enter?

One color per line, in any of three formats: 6-digit or 3-digit hex (like #ff0000 or #f00), an rgb()/rgba() function (like rgb(255, 0, 0)), or a standard CSS Color Module Level 4 keyword (like tomato).

What happens if a line isn't a valid color?

That line is skipped and listed separately after conversion so you can fix a typo, rather than the whole batch silently failing or a bad line rendering as a wrong color.

Why are swatches labeled with a hex code even if I typed a color name?

Labels are rendered using this category's built-in retro bitmap font, which only supports uppercase letters and digits, so every swatch is labeled with its resolved hex value for consistency regardless of how you entered it.

Does this upload my color list anywhere?

No. Parsing and rendering both happen entirely in your browser; nothing you enter is sent to a server.

Color Swatch Visualizer - Turn a Color List into a Swatch Grid PNG

Overview

Introduction

This tool turns a plain-text list of colors into a single labeled swatch grid image, entirely client-side, useful for quickly visualizing a palette pulled from code, a design brief, or a style guide.

It accepts three of the most common ways colors show up in real projects: hex codes, rgb()/rgba() functions, and CSS color names, all in one input.

What Is Color Swatch Visualizer?

A client-side color palette visualizer that parses each line of a textarea as a color, arranges valid colors into a roughly square grid, and stamps each swatch with its resolved hex label.

Invalid lines are collected and reported separately rather than breaking the whole conversion.

How Color Swatch Visualizer Works

Each non-empty line is tested against a hex pattern, then an rgb()/rgba() function pattern, then a lookup against the standard CSS Color Module Level 4 keyword list; the first match wins.

Valid colors are laid out left-to-right, top-to-bottom into a grid sized to fit them all, with each swatch's cell split into a solid color block and a label strip below it.

When To Use Color Swatch Visualizer

Use it to turn a palette of hex codes copied from a design tool, CSS file, or brand guide into a quick visual reference image.

It's also handy for sanity-checking a list of CSS color names or rgb() values before committing them to code.

Often used alongside Color Names to PNG Converter, Color Wheel Generator and Triadic Color Palette Generator.

Features

Advantages

Runs entirely client-side; your color list is never uploaded to a server.
Accepts three common color formats in the same input without needing to normalize them yourself first.
Reports invalid lines clearly instead of silently dropping or misrendering them.

Limitations

Labels are rendered with a small built-in bitmap font supporting only uppercase letters and digits, so they always show the resolved hex value rather than the original text you typed.
A very large color list will produce a correspondingly large image, capped at the site's 4096x4096 maximum dimension.

Examples

Visualize a small brand palette

Input

Three lines: #FF6B6B, #4ECDC4, #1A535C

Output

A 3-swatch grid, each labeled with its hex code

Mixed hex-only input renders as a compact single row.

Visualize a mixed-format list with one typo

Input

Three lines: tomato, rgb(78, 205, 196), #zzzzzz

Output

A 2-swatch grid, with '#zzzzzz' reported as an invalid line

The tool renders every valid line and clearly reports the one that didn't parse.

Best Practices & Notes

Best Practices

Put one color per line for the clearest, most predictable grid layout.
If a line gets reported invalid, double check for a missing # on a hex code or an extra character in an rgb() function.

Developer Notes

visualizeColorSwatches parses each line against a hex regex, then an rgb()/rgba() regex, then a lookup into the shared CSS_COLOR_NAMES table exported from color-names-to-png-converter, reusing that tool's 148-keyword table rather than duplicating it; swatch labels reuse addTextToPng from png-text-adder to stamp resolved hex codes directly onto the generated buffer.

Color Swatch Visualizer Use Cases

Turning a copied list of hex codes into a shareable palette image
Spot-checking CSS color names or rgb() values before using them in code
Building a quick visual reference sheet for a brand or design system palette

Common Mistakes

Putting multiple colors on one line separated by commas instead of one per line.
Expecting a swatch label to show the exact text you typed rather than its resolved hex value.

Tips

Paste directly from a CSS variables file or design tool's export list; most one-color-per-line formats work as-is.
Use the Color Names to PNG Converter instead if you only ever work with CSS keyword names and want simpler column control.

Color Swatch Visualizer