New Tool: Color Format Converter

One Color, Every Notation

Colors travel through a lot of formats. Your design tokens might be HEX, your CSS uses rgb() or hsl(), your print spec wants CMYK, and a perceptual tweak is easiest in LAB or LCH. The new Color Format Converter takes a single color and shows it in all of them at once — no mental math, no round-tripping through three different sites.

Paste Anything, Pick Anything, Edit Anything

Enter a color however you already have it: a HEX code (#3b82f6 or #3b82f6cc with alpha), an rgb()/rgba() or hsl()/hsla() string, an hwb() value, or a plain CSS color name like rebeccapurple. Prefer to work visually? Use the built-in color picker or the eyedropper to grab a color straight from your screen.

Better still, every output field is editable. Type a value into the LAB row, the CMYK row, or even the raw decimal integer, press Enter, and the entire panel — preview, accessibility readout, harmonies, and all the other notations — recomputes from it. Click any row to focus its input, and tap the copy icon to send a value to your clipboard.

Every Format You Need

The converter outputs a comprehensive set of formats, updated live as you type:

• HEX and HEX8 (with alpha)
• RGB — integer, normalized 0–1 float, and percentage
• HSL, HSV/HSB, and HWB
• CMYK for print workflows
• LAB and LCH for perceptual color work
• XYZ, HCG, and Apple RGB16
• ANSI 16 and ANSI 256 for terminal colors
• CSS keyword (when the color maps exactly) and the decimal integer value

Tap the copy icon on any row to send that value straight to your clipboard.

Control the Precision

Floating-point formats like HSL, HSV, CMYK, LAB, LCH, XYZ, and the normalized RGB float can carry as much detail as you need. A precision control lets you choose how many decimal places to display — from clean rounded values for documentation to full precision for exact conversions.

A Word on Accuracy

Not every color space is created equal. Conversions between HEX, RGB, HSL, HSV, HWB, HCG, and Apple RGB16 are exact — they are just different views of the same sRGB color, so they round-trip perfectly. A few formats, however, are estimates, and editing them and converting back can drift:

• ANSI 16 and ANSI 256 snap your color onto a fixed terminal palette (16 or 256 entries). Most colors land on the nearest swatch, so the value you get back rarely matches the one you started with.
• LAB, LCH, and XYZ can describe colors well beyond what a screen can show. If you type a value outside the sRGB gamut, it is clamped to the closest displayable color — handy, but not a perfect reversal.
• CMYK uses a simple device-independent approximation (no ICC profile), so treat it as a guide for print rather than a color-managed proof.

The tool always shows you the real, rounded value for each format, so you can see at a glance when a notation is approximating rather than reproducing your color exactly.

Built-In Accessibility Check

A large preview swatch shows your color in context, and an accessibility panel reports the WCAG relative luminance, the contrast ratio against both white and black, the matching WCAG level (AA/AAA), and a suggested readable text color. It is a quick gut-check before you commit a color to a UI. For a deeper audit, reach for the dedicated Color Contrast Validator.

Instant Harmonies

Beyond conversion, the tool generates complement, triade, tetrade, and analogic palettes from your current color, so exploring matching colors is one glance away. When you want to go further, the Color Palette Generator and Color Swatch Generator pick up where this leaves off.

Who It's For

• Frontend developers translating design tokens between CSS color functions
• Designers moving colors between screen (RGB/HSL) and print (CMYK)
• Anyone who needs LAB/LCH values for perceptual adjustments or terminal color codes

Privacy First

Like every tool on PowerDev.Tools, the Color Format Converter runs entirely in your browser. Your colors never leave your machine — no server-side processing, no tracking, and no accounts required. Install the PWA and it works offline too.

Try It Out

Head over to the Color Format Converter and give it a try. As always, it is free, private, and works offline.

Subscribe to the newsletter to get notified when new tools are released.