What is the best free color converter? A free color converter should do four things well: translate HEX, RGB, HSL, and CMYK in real time, copy any value with one click, accept whatever format you paste in without complaining, and remember the colors you converted ten minutes ago. Most free tools nail the first two and forget the rest. Hextly is built around all four. The recent-colors panel survives a refresh, so the color you grabbed before lunch is still there after.
That last part is the one nobody else does. Search any free converter and you'll land on a clean four-format page that resets to gray every time the tab reloads. Hextly keeps your last ten colors in localStorage. The workflow stops feeling like a series of one-shot lookups and starts feeling like a tool you actually live in.
How do I convert HEX to RGB?
Paste or type the HEX value into the HEX field. With or without the leading #. Three-character shorthand or six. The RGB, HSL, and CMYK fields update the moment the value parses. Click the copy button next to RGB and the value lands on your clipboard with a quick "Copied!" confirmation. No submit button. No "Convert" step. No modal.
Most converters get input handling wrong. They reject #f0a because it's shorthand. They reject f0a because there's no #. They reject rgb(123, 97, 255) because the parens confuse them. Hextly accepts all of those. It normalizes inputs internally so you can paste whatever your design tool, browser inspector, or codebase happens to spit out. Out-of-range values (an R channel above 255, a saturation above 100) get an inline error, but the last valid color stays visible in the swatch and the other fields. You never lose state.
How do I convert HEX to CMYK for print?
Type the HEX in the HEX field; the CMYK values appear in the CMYK card. Copy them with the adjacent button. Hextly does device-independent CMYK conversion, which means the math is correct, but the output is not ICC-profile-accurate. For most agency print handoffs that's fine. The print shop or your prepress lead will run the file through their own profile anyway. There's a small disclaimer near the CMYK field that says exactly this, because surprising a designer with the difference between math-CMYK and press-CMYK is how trust dies.
This is where Hextly fills a real gap. ConvertAColor handles all four formats but gives you no history. ColorHexa has encyclopedic depth but no live picker. Adobe Color does CMYK well but locks it behind a paid Creative Cloud login. If you need a quick HEX-to-CMYK conversion without opening Photoshop or signing in, Hextly is the shortest path between the value you have and the value you need.
How do I convert RGB to HSL for Tailwind?
Tailwind's CSS variable system uses HSL with space-separated values. To get there from an RGB triplet: enter the RGB values in the RGB card, copy the HSL output, and paste it into your --color-foo: 250 100% 67% declaration. Hextly outputs HSL in the standard hsl(h, s%, l%) notation. Strip the parens and commas yourself, or just grab the three numbers.
The same flow works in reverse if you have a Tailwind variable and want to see what color it actually is. Paste the HSL into the HSL card, see the RGB and HEX appear, and visually confirm in the preview swatch. The picker on the page mirrors whatever you type, so you can also drag the hue slider and watch all four formats update if you want to nudge the color slightly without leaving the tool.
What is the difference between HEX, RGB, HSL, and CMYK?
HEX, RGB, and HSL are three different ways of describing the same screen color: additive light, mixed from red, green, and blue. HEX is the compact base-16 notation web developers and designers use most. RGB names the channels directly with values 0–255. HSL describes the same color in terms of hue, saturation, and lightness, which maps better to how humans think about color and is why Tailwind and modern CSS lean on it.
CMYK is the odd one. It's a subtractive model for ink on paper, with cyan, magenta, yellow, and black channels. A perfectly converted HEX-to-CMYK value will not always match the screen because the gamuts are different. The math gets you in the neighborhood; a press-side ICC profile gets you the rest of the way.
A single tool that handles all four matters because real design work crosses these boundaries constantly. A brand color exists in a CSS file as HEX, in a print proof as CMYK, in a Figma component as HSL, and in a developer's handoff sheet as RGB. Hextly lets you grab any of those representations from any of the others without breaking flow.
Does Hextly remember my recent colors?
Yes. Every valid color you convert gets added to the Recent Colors panel automatically, up to ten, with the oldest dropped when the panel fills. The list lives in your browser's localStorage. Closing the tab, refreshing the page, or coming back tomorrow will not wipe it. Click any past swatch and the full state restores: every format field, the preview swatch, and the picker snap back to that color.
A normal session for a working designer is not "convert one color, leave." It's "convert eight colors over an afternoon, then revisit two of them tomorrow." Free converters that reset to neutral on every page load force you to keep your own running list, usually in a sticky note app or a comment in your CSS. Hextly absorbs that overhead.
Why a converter, and why now?
Hextly is part of Infinite Orchard's microapp portfolio: small, single-purpose tools that fix one annoyance well. The color converter category is mature, but mature doesn't mean solved. Every existing free option has a clear gap. Missing CMYK. No history. No picker. Dated UI. A paywall in front of the formats you actually need. Hextly is opinionated about those gaps. It does four formats, it does them quickly, it doesn't ask for an account, and it remembers what you were doing.
If you're a designer or front-end developer who converts colors more than a few times a week, give it five minutes. Convert a few values, refresh the page, and watch the history come back.
Try Hextly — free, no signup, no limits.