Color Converter

How Color Converter works

Convert colours between HEX, RGB, HSL and HSV, check contrast ratios and copy ready-to-use CSS values. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

Four ways to write one colour

HEX is what CSS and design tools default to, RGB matches what the screen actually emits, HSL describes hue, saturation and lightness in human terms, and HSV is the model behind most colour pickers. The same colour has four correct representations.

Conversion is exact in one direction and lossy in the other only through rounding — HSL to hex and back can shift a value by one step out of 255.

Why HSL is easier to reason about

To make a colour lighter you change one number in HSL. In RGB you change three, and the result drifts in hue. That is why design systems store tokens as HSL even when they output hex.

The hex shortcut

#38F2CF is three bytes: 0x38 = 56 red, 0xF2 = 242 green, 0xCF = 207 blue. Three-digit shorthand (#3FC) works only when each pair repeats a digit, which is why most modern palettes use six.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions