Color Converter — RGB, HEX, HSL & CMYK Formats 

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What are color formats?

Color formats are different ways to represent a color digitally. The main formats are: RGB (Red, Green, Blue) — used for screens and displays; HEX (hexadecimal code) — popular in web development; HSL (Hue, Saturation, Lightness) — more intuitive for designers; CMYK (Cyan, Magenta, Yellow, Key/Black) — used in print design.

How to convert between color formats?

Select the input format (RGB, HEX, HSL, or CMYK), enter the values, and the tool instantly calculates all other formats. For example, #FF5733 in RGB is (255, 87, 51), in HSL is hsl(11°, 100%, 60%), and in CMYK is cmyk(0%, 66%, 80%, 0%).

What are the color conversion formulas?

RGB to HEX: each channel (0–255) is converted to a two-digit hexadecimal number. RGB to HSL: compute the max and min channels, then calculate hue, saturation, and lightness using standard formulas. RGB to CMYK: first determine the black (K) value as 1 minus the max channel, then compute the other channels relative to K.

What are some color conversion examples?

Example with #336699: RGB (51, 102, 153), HSL (210°, 50%, 40%), CMYK (67%, 33%, 0%, 40%). Example with #FF0000 (pure red): RGB (255, 0, 0), HSL (0°, 100%, 50%), CMYK (0%, 100%, 100%, 0%). White is #FFFFFF = RGB(255,255,255) = HSL(0°,0%,100%) = CMYK(0%,0%,0%,0%).

When to use which color format?

Use RGB for screen graphics and web design. Use HEX in CSS and HTML code — it is compact and widely supported. Use HSL when you need to intuitively adjust hue or saturation. Use CMYK when preparing print designs, as it accurately represents how ink colors mix in printing.

What is the difference between RGB and CMYK?

RGB is an additive color model: combining red, green and blue light at full intensity produces white. It is used for screens and digital output. CMYK is a subtractive model used in print — cyan, magenta, yellow and black inks absorb different wavelengths of light. Colors that look vivid on screen can appear duller in print, so always convert RGB to CMYK before preparing files for a printer.

Which color formats does CSS support?

Modern CSS and browsers support rgb(), #hex, hsl(), hwb() and named keywords like red and blue. Use rgba() or hsla() when you need an alpha (transparency) channel. CMYK is not directly supported in CSS because it is intended for print. The oklch() and oklab() functions from CSS Color Level 4 offer more perceptually uniform color adjustments. HEX color codes are hexadecimal numbers — our number base converter can help you understand the underlying binary and decimal values. For generating secure random values in web projects, the password generator is a useful companion tool.