The tool solves three main tasks.
The first is accurate color matching.
This is important when a hue needs to be placed as accurately as possible into an existing area of the painting: in a portrait, in skin tones, in halftones, and in other key parts of the work. Thanks to direct comparison along the line of sight, and to the same lighting on the plane of the disk and the canvas, the mixture can be brought almost to a perfect match before it ever touches the painting. After that, the artist can place the stroke exactly where it is needed with confidence.
The second is shifting color in a more artistic direction.
Using the existing colors in the painting as a reference, the artist can consciously adjust the new ones: make them stronger or weaker, shift them warmer or cooler, change their saturation. At the same time, the result is seen immediately, in the context of the painting, without testing it on the canvas.
You can mix a bold, unexpected hue and immediately see whether it belongs in the fabric of the painting or falls out of it, where it might work, and in which direction it needs to be adjusted. This makes it possible to search for more daring color solutions. The tool removes uncertainty: before you apply a stroke, you already see it “in action”. If the hue works, it can go into the painting. If it does not, it stays on the palette. The tool gives you a way to work with color thoughtfully and to find the most accurate and expressive solutions.
The third is integrating complex hues.
On a regular palette, when many different paints have been mixed during the process, these hues often seem dull or dirty to us. Because of that, we often ignore them or even scrape them away.
But when such a color is brought into the same line of sight as the painting, it becomes clear that even a very quiet, unobvious hue can fit exactly into a specific area, improve it, make it more complex, and make the painting subtler. This is one of the qualities of direct comparison: it allows you to see the real value of a hue precisely in the context of the painting. Very often, a weak and almost unnoticeable color turns out to be strong exactly because it lands in the right place.
This is especially important because, both in nature and in good painting, the main color structure is usually held together not by bright accents, but by quiet, complex hues. They support the main accents, connect color relationships, and make the painting more refined.