6 Free Online RGB to Lab Converter Tools

Here is a list of the best free online RGB to Lab converter tools. RGB represents colors using Red, Green, and Blue channels. It is an additive color model that is widely supported by electronic displays and digital imaging devices. On the other hand, Lab is another color model where L* represents lightness from black (0) to white (100), a* represents the green-red axis, and b* represents the blue-yellow axis.

LAB color space has advantages over RGB as it provides a perceptually uniform representation of colors. This makes the Lab color model suitable for color editing and adjustments. It also allows for device-independent color communication. This can ensure consistent color reproduction across different devices and media.

Coming to RGB to Lab conversion; it is a process of transforming colors from RGB color space to Lab color space. The way to convert RGB to Lab first requires you to convert RGB to XYZ and then convert XYZ to Lab. This also includes gamma correction for RGB and XYZ scaling constraints. This all sounds complicated but you can do it all within seconds using an online RGB to Lab converter. This post covers 6 tools where you can convert RGB to Lab color space. Let’s explore these tools in detail.

My Favorite Online RGB to Lab Tool

EasyRGB is my favorite tool on this list to convert RGB to Lab online. This tool simply converts the given RGB color to 15 color models. This allows you to get the Lab value of the corresponding color. The calculator also provides pre-formatted code for various markup and programming languages that you quickly copy and use.

You can check out our other lists of the best free Online Image Color Picker Websites, Online Color Shade Generator Websites, and Online RGB to HEX Color Converter Websites.

Comparison Table:

Name	RGB Input	LAB Representation	Color Models Supported
EasyRGB	Value	Decimal	~15
Aspose	Value / Picker	Percentage	12
Colormath	Value	Decimal	~30
ConvertingColors	Value	Decimal	~17
Colormine	Value	Decimal	-
NixSensor	Value	Both	5

EasyRGB

EasyRGB is a website that provides tools and resources for color management. One of the tools available on the website is the color conversion tool, which allows users to convert color data across different color standards and color spaces such as RGB, CMYK, Lab, Lch, L*uv, Hunter, and XYZ. You can use this tool to convert RGB to Lab online. The tool supports sRGB 0-255, sRGB 0-1.0, or AdobeRGB 0-255 color models. You can simply pick the color model for the input and then enter the values of R*G*B* and perform the conversion. It shows the corresponding color in all the supported color models. It shows the Lab value of the color in decimal. Along with that, it also provides Pre-formatted code for CSS, HTML, JAVA, .NET, openGL, etc. This calculator also links to other color tools to match colors, create color palettes, and more.

Steps to convert RGB to Lab online with EasyRGB:

• Click on “Select data type…” and pick sRGB 0-255, sRGB 0-1.0, or AdobeRGB 0-255 as per your requirements.
• Enter the respective R*G*B* values into the respective fields there.
• Then click the “Convert” button to perform the conversion.
• Get the “CIE-L*ab” color values from the output.

Highlights:

• RGB Input: Enter R*G*B* values.
• Output Lab Format: Lab Decimal.
• Additional Features: Color conversion to around 15 color models. Tools to match colors and create color palettes.

Aspose

Aspose offers a variety of tools covering converters, editors, and more. It has an Aspose.SVG tool which allows you to convert colors between different color models like RGB, HEX, HSL, HSV, HWB, LAB, CMYK, LCH, XYZ, OKLAB, OKLCH, RGBA, HSLA, etc. You can use this tool to convert RGB to Lab online. It takes the RGB value as input and then converts the respective color to all the possible color models. It shows the corresponding color values for all the color models that you can copy to the clipboard in a single click.

Steps to convert RGB to Lab online with Aspose:

• Select RGB as the “Color Model” in the top right corner of the tool.
• Enter the values of R*G*B* into their respective fields. Alternatively, you can pick a color from the color picker present on the screen.
• This converts the color to all 12 color models. Use the “Copy” button alongside LAB values to copy the color value.

Highlights:

• RGB Input: Enter R*G*B* values or pick a color.
• Output Lab Format: Lab Percentage.
• Additional Features: Color conversion to 12 color models.

Colormath

Colormath offers a simple online Color Converter that you can use to convert RGB to Lab. This tool supports 30 color models. You can simply select an input color model, add your color values, and convert that to other supported color models. Coming to RGB to Lab conversion, the tool supports sRGB 0-255 or sRGB 0-1.0 color models. You can pick the desired RGB model and add your color values accordingly to perform the conversion. In the output, it converts the input color to all supported color models. Among that, it provides the Lab decimal value of the corresponding color that you can select and copy.

Steps to convert RGB to Lab online with Colormath:

• Select sRGB 0-255 or sRGB 0-1.0 color model from the “Convert from” drop down.
• Type the values of R*G*B* into their respective fields.
• Scroll down and look for “LAB” in the output and copy the color value.

Highlights:

• RGB Input: Enter R*G*B* values.
• Output Lab Format: Lab Decimal.
• Additional Features: Color conversion to around 30 color models.

ConvertingColors

ConvertingColors provides a color conversion tool that allows users to convert between color models such as HEX, RGB, CMYK, HSV, HSL, CIELab, Android, Decimal, and YUV. You can convert multiple colors at once or get conversions via the REST API. It supports a total of  17 color modes. The tool on the website directly takes a color value in the format of the respective color model. The output lists the matching color values in all the other color models. It uses CIELab format that shows the color values in decimal. Alongside the value, you get a button to copy that color value into the clipboard.

Steps to convert RGB to Lab online with ConvertingColors:

• Click on the input section and delete any pre-filled text/value.
• Type “RGB” there and pick the RGB color format. Edit the input to add your RGB value in the format.
• Then click on the “Convert” button and scroll down to find the “CIELab” value.
• Click the copy-icon alongside to copy the value to the clipboard.

Highlights:

• RGB Input: Enter RGB value.
• Output Lab Format: Lab Decimal.
• Additional Features: Supports around 17 color models.

Colormine

Colormine is another website that you can use to convert RGB to Lab online. This website features a simple color converter that you can configure for any color model. It offers a dedicated RGB to Lab converter as well. This tool takes the RGB value as input and converts that to Lab color. It shows the Lab values on the screen right next to the added RGB. The Lab values are in decimal format here. Along with that, this calculator also provides the log function of the added color values.

Steps to convert RGB to Lab online with Colormine:

• On the “Rgb” side, enter the values of R*G*B* into the respective fields.
• This gives you the corresponding L*A*B values on the “CIE-L*ab” side.

Highlights:

• RGB Input: Enter R*G*B* values.
• Output Lab Format: L*a*b* Decimal.
• Additional Features: N/A.

NixSensor

NixSensor specializes in color-matching tools and devices. The website features a free color converter tool that works with 5 color models including RGB and Lab. The tool comes with a bunch of settings where you can set the input color model along with the following options:

• Illuminant and reference angle for input values
• Illuminant and reference angle for output values
• XYZ ranges from 0 to 1 if checked

By selecting RGB as the input color model, you can configure the tool for RGB to other color conversions. Then you can simply add your RGB values and run the conversion. Upon conversion, it gives you the corresponding CIELab value in decimal.

Steps to convert RGB to Lab online with NixSensor:

• Open this tool and scroll down to the “Settings“. Set “RGB” as the “Input System” there.
• Then go to the “Input” section and enter the R*G*B* values.
• Doing this gives you the “CIELAB” values in decimal.

Highlights:

• RGB Input: Enter R*G*B* values.
• Output Lab Format: Lab Decimal.
• Additional Features: Converts input to 5 color models.

Frequently Asked Questions