Comparing Colour Values Using Colour Patches
While using the Colour Management menu or node, you can sample image channel values in the source and result to compare their pixel values. The colour patches appear to the left of either the Colour Transform details or the LUT Editor graph.
To use colour patches in the Colour Management menu or the Colour Management node in Batch or Batch FX:
Click the Source or Result sampling box.
The cursor changes to a colour picker.
Click the image.
Both source and result colours are sampled simultaneously. The RGB values for the selected pixel are displayed, and the sampling boxes take on the corresponding colour.