Improved Color-Based Segmentation
Many color-oriented pipelines require an image region belonging to specific colors to be identified. However, it is not always easy to convert perception-based terminology to a precise formulation. Version 12 of the Wolfram Language introduces many new utilities to find, segment and replace colors in images.
Build a segmentation mask using a specific color reference.
Some colors might be difficult to guess.
Use FindMatchingColor to find the best match for Blue in the image and build a mask with the improved reference color.