Convert color values in ColorSync Utility on Mac
If you know the values for a color in one color space or profile, you can convert them to find the correct values for that color in another color space or profile.
In the ColorSync Utility app on your Mac, click Calculator in the toolbar of the ColorSync Utility window.
On the left, choose the color space, rendering intent, and profile you want to convert from.
Enter the values to convert.
You can use the text fields and sliders, or you can click the magnifying glass, then click a pixel of the color on your screen.
On the right, choose the color space, rendering intent, and profile you want to convert to.
The converted values appear.