Color Converter & Palette Studio

What is color conversion?

Digital displays, design tools, and printing systems describe and reproduce color in different ways. Color conversion translates a color between these representations so the same shade can be used in CSS, design software, image workflows, or print preparation.

Common color models include:

• RGB and HEX: Screens create color using red, green, and blue light. Each RGB channel typically ranges from 0 to 255. HEX represents those same RGB channel values using hexadecimal notation such as #225F73.
• HSL and HSV/HSB: These models reorganize RGB values around hue, saturation, and lightness or brightness. They are often easier to work with when choosing colors, adjusting brightness, or creating related shades.
• CMYK: Printing commonly uses Cyan, Magenta, Yellow, and Black inks. The separate black channel helps produce cleaner dark tones and text while reducing the amount of colored ink needed for neutral blacks.

How to convert color codes

1. Enter a color value Type or paste a supported color such as HEX, RGB, RGBA, HSL, HSV, CMYK, or a CSS named color.
2. Choose a color visually Use the color picker to select a color and update the converted values.
3. Adjust transparency if needed Use the alpha control to create transparent colors such as #225F73CC or rgb(34 95 115 / 80%).
4. Check contrast Compare the selected color against white and black backgrounds to see how the combination performs against common WCAG contrast thresholds.
5. Copy the format you need Copy the converted HEX, RGB, HSL, HSV, or CMYK value, or choose a lighter or darker variation from the generated palette.

Color format comparison

Different formats are useful for different workflows. This table shows how the most common color formats represent the same kind of visual information.

Color conversion examples

These examples show how several colors can be represented in HEX, RGB, HSL, and approximate CMYK values.

CMYK values shown by mathematical converters should be treated as approximate references rather than final production-print specifications.

How HEX converts to RGB

A 6-digit HEX color contains three pairs of hexadecimal digits. The pairs represent red, green, and blue values.

HEX: #225F73

22 → Red
5F → Green
73 → Blue

Red:
(2 × 16) + 2 = 34

Green:
(5 × 16) + 15 = 95

Blue:
(7 × 16) + 3 = 115

Result:
rgb(34, 95, 115)

HEX and RGB can represent the same 24-bit color directly, so converting a normal 6-digit HEX value to RGB does not change the color.

How RGB converts to HSL

RGB values are first normalized from 0–255 to a range from 0–1:

R' = R / 255
G' = G / 255
B' = B / 255

The maximum and minimum normalized channels are then used to calculate lightness, saturation, and hue.

• Lightness: L = (Cmax + Cmin) / 2
• Saturation: If all channels are equal, saturation is 0%. Otherwise it is calculated from the difference between the maximum and minimum channel values.
• Hue: Hue depends on which RGB channel is the largest and is expressed as an angle from 0° to 360°.

HSL is especially useful when you want to keep a similar hue while changing how light, dark, vivid, or muted a color appears.

How RGB converts to CMYK

A simple mathematical RGB-to-CMYK conversion first normalizes the RGB channels and calculates the black component:

K = 1 - max(R', G', B')

C = (1 - R' - K) / (1 - K)
M = (1 - G' - K) / (1 - K)
Y = (1 - B' - K) / (1 - K)

For pure black, where K = 1, Cyan, Magenta, and Yellow can be treated as 0 in this simple mathematical model.

Alpha transparency and 8-digit HEX

Standard 6-digit HEX uses the form #RRGGBB. An 8-digit HEX color adds an alpha channel at the end:

#RRGGBBAA

The alpha pair ranges from 00 for fully transparent to FF for fully opaque.

The same transparency can also be written using CSS syntax such as rgb(34 95 115 / 50%).

Why RGB colors can look different in print

RGB displays and CMYK printing reproduce different ranges of color. Some bright RGB colors cannot be reproduced exactly using a particular combination of printer, ink, and paper, so the printed result may look less saturated or slightly different from the screen version.

The mathematical CMYK values produced by a browser color converter are useful as an initial reference, but they are not a substitute for a color-managed print workflow.

Color contrast and WCAG accessibility

Text needs enough contrast against its background to remain readable. WCAG uses a contrast ratio ranging from 1:1 for identical colors to 21:1 for the highest possible black-and-white contrast.

• Normal text: A contrast ratio of at least 4.5:1 is commonly required for WCAG Level AA.
• Large text: A ratio of at least 3:1 is commonly required for Level AA.
• Enhanced contrast: Level AAA uses higher thresholds of 7:1 for normal text and 4.5:1 for large text.
• UI components: Visual information needed to identify interactive components and their states generally requires at least 3:1 contrast against adjacent colors.

The contrast checker compares the selected color with white and black backgrounds and shows whether those specific combinations meet common WCAG contrast thresholds.

A passing contrast ratio for one background does not mean the color will be accessible in every interface. Font size, weight, surrounding colors, and interaction states also matter.

Practical use cases for a color converter

• CSS development: Convert HEX values from a design file into RGB, HSL, or transparent CSS colors.
• Theme creation: Adjust hue, saturation, and lightness when creating hover, focus, active, and disabled states.
• Design handoff: Compare values used by design software with formats required by a website or application.
• Print reference: Generate an approximate CMYK starting point before moving into a color-managed print workflow.
• Accessibility checks: Compare foreground colors with common light and dark backgrounds before using them for text or interface elements.
• Palette generation: Create lighter and darker variations of a base color for related UI elements.

Browser-based execution and privacy

Color parsing, format conversion, contrast calculations, and palette generation run entirely in your browser. The tool guarantees full privacy because no color values or design tokens are ever transmitted to an external server.