View
Crop
Original
Posterized
Value Distribution
Click a bin to isolate that value band
Grid Overlay
Original
Lightened
Rough Sketch
Click to Sample a Color
Click anywhere on the image to pick a color.
Screen vs. paint. The image shows transmitted light (additive RGB) β your screen can display colors more luminous and saturated than any pigment can reach. The recipe below mixes paint subtractively (Kubelka-Munk), the way reflected light really behaves, and reports how close the mix can get. A large ΞE means the sampled color is a βscreen colorβ outside the paint gamut.
Palette (saved to this browser)
Add Paint from W&N Artists' Oil Colour
Upload or photograph your underpainting to compare it with the reference image. Mark the four corners of the canvas so the tool can rectify the perspective.
Important: The reference must represent the whole canvas. Corner-placement errors can look like painting errors.