ProToolBox

HEX, RGB, HSL - one panel, always matched

Choose Source for the row you are editing. HEX, RGB, and HSL stay in step with the preview. Copy the full bundle when it looks right. Runs in your browser; no signup.

Color converter - sync and copy

Edit HEX, RGB, or HSL. The other two and the preview track the same color so you skip hand math.

1 Set Source to your active row · 2 Type or use the picker · 3 Check the preview · 4 Copy results

Your result

Source is the row you are changing. Try #2563EB or RGB 37, 99, 235. Need WCAG text checks? Contrast checker.

Quick samples

The wheel sets a color, moves Source to HEX, and updates RGB/HSL.

RGB channels
HSL

Updates live as you edit.

Change one row—the rest stay matched.

Next: Contrast · Color picker · HEX → RGB · HEX → HSL · Palette · All tools

  • Runs on your device, not our servers
  • Nothing leaves this tab unless you copy it
  • Free and fast
  • No account
  • Same privacy approach as the rest of ProToolbox

When to use it

Specs jump between HEX, RGB, and HSL. This page keeps one live color while you copy the notation your stack expects.

  • Theme files and CSS variables
  • Handoff between design apps and code
  • Spreadsheets or docs that use different columns
  • Before contrast or palette passes

It converts—it does not replace your brand guidelines.

Bookmark it for token migrations and “what is this in HSL?”

Overview

Source tells the tool which row you are driving. Everything else, including the swatch, follows so you never retype the same paint three ways.

How it works

  1. Set Source to HEX, RGB, or HSL—the one that matches your paste.
  2. Edit values or use the picker; the preview and sibling fields update.
  3. Tap individual lines or Copy color results for the bundle.
  4. Next: contrast, picker, or palette tools via the links below.

Privacy: Conversion runs in your browser. We do not receive your colors.

FAQ

  • Why Source? Only one row drives the math; the others mirror it so values never fight.
  • Account? Not required.
  • Phone? Yes—fields and preview scale down.
  • Production CSS? Yes—paste rgb(), hsl(), or HEX straight into stylesheets.

Keep it one click away when formats change mid-project.

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