Color Code Conversion

Color Code Conversion (Color Converter)

When you specify a color using the color picker or a numerical value, the system automatically calculates the HEX, RGB, HSL, HSV, and CMYK values. You can copy each format with a single click and check the contrast ratio with complementary colors and text colors.

Enter a color

Supports #RGB, #RGBA, #RRGGBB, and #RRGGBBAA formats.

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Translation Result

The entered colors have been converted to each color format.

Sample Text
HEX—
HEXA (with opacity)—
RGB—
RGBA—
HSL—
HSLA—
HSV / HSB—
CMYK—

Complementary colors

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This is the opposite color, shifted by 180 degrees along the hue axis.

Contrast with text color

Ratio to white text—
Ratio to black text—
Easy-to-read text color：—

All color conversion is performed within the browser; input data is not sent to the server.

What is a color code conversion tool?

The Color Code Converter is a free online tool that converts numerical color representations used in web design, app development, image editing, and print design.Even for the same color, the format used to specify it—such as HEX, RGB, HSL, HSV, or CMYK—varies depending on the application or software. With this tool, you can view the values for all major formats at a glance simply by entering a single color.

HEX is a hexadecimal notation widely used in website CSS. For example, white is represented as #FFFFFF, and black as #000000.RGB is a system that combines red, green, and blue light on a scale from 0 to 255 and is used to handle colors on displays. RGBA and 8-digit HEXA also allow you to specify opacity, making them useful for creating semi-transparent background colors and overlays.

HSL represents color using hue, saturation, and lightness. Hue is specified on a color wheel ranging from 0 to 360 degrees, while saturation and lightness are specified on a scale from 0 to 100%.This format makes it easy to intuitively adjust colors, such as making them slightly brighter or toning down their vibrancy. HSV or HSB represents color using hue, saturation, and brightness, and is used in many graphics programs and color pickers.

CMYK is a color model based on the amounts of cyan, magenta, yellow, and black ink, and is primarily used in the printing industry. However, CMYK values calculated mathematically from on-screen RGB colors are only a rough guide.Since actual print results depend on factors such as paper, ink, the printing press, and ICC profiles, please check with your printing company and verify your color management environment for printed materials that require color accuracy.

This tool displays not only values for each format, but also a preview of the selected color, its complementary color (shifted by 180 degrees in hue), and the contrast ratio when white and black text are overlaid. It is useful for selecting text colors that are easy to read against the background color and for considering color schemes with accessibility in mind.All calculations are performed within the browser, and the color information you enter is never sent to the server.

How to Use

  1. Use the color picker or enter a value in HEX, RGB, HSL, HSV, or CMYK.
  2. Depending on the format you enter, values in other color formats will be updated automatically.
  3. If transparency is required, adjust the transparency slider or the numeric field.
  4. When you click “Display Conversion Results,” you’ll be taken to the results section where you can check each format, complementary colors, and contrast ratio.
  5. Click "Copy" in the desired format, then paste it into CSS, design tools, documentation, etc.

Precautions for Use

  • CMYK values are general conversions derived from RGB and do not guarantee exact color reproduction in print.
  • Transparency is reflected in RGB, HSL, and HEXA outputs, but CMYK does not include the concept of transparency.
  • Depending on your display, browser, and OS settings, the same color code may appear differently.
  • The contrast ratio is calculated based on opaque colors, excluding transparency. Readability may vary depending on the actual background image and how elements overlap.
  • Very small decimal numbers will be rounded to an appropriate number of decimal places for readability.

Frequently Asked Questions

Colors are represented in hexadecimal notation. Typically, a 6-digit #RRGGBB format is used; when including transparency, an 8-digit #RRGGBBAA format is used.

RGB consists of three components—red, green, and blue—while RGBA adds an alpha channel to represent transparency.

This is useful when you want to adjust the brightness or saturation while keeping the same hue. It’s also well-suited for creating color variations in CSS.

Generally, these refer to the same model. "V" stands for "Value" and "B" stands for "Brightness," though the terminology may vary depending on the app.

Displays approximate values based on general formulas. ICC profiles and a specific printing environment are required to achieve accurate print colors.

Yes. If you enter a value in #RGB format, it will be converted to #RRGGBB, with each digit repeated twice.

Yes. It supports both #RGBA and #RRGGBBAA input and output.

These are colors located on the opposite side of the color wheel. This tool calculates them by shifting the HSL hue by 180 degrees.

This quantifies the difference in brightness between the background color and the text color. Generally, the higher the number, the easier it is to distinguish the text.

Compare the contrast ratios in the results section; choosing the one with the higher ratio will improve readability.

No. The conversion and display take place entirely within the browser; color values are not sent to the server for processing.

Yes. You can convert values using the color picker or numerical input fields in supported browsers.