[색의 문법] 사각 배색

Tetradic (rectangle) color scheme: a pixel-art cross-stitch embroidery in a round wooden hoop on a plain linen background, the stitched design a simple geometric quilt pattern of squares and triangles using ONLY four thread colors that form two complementary pairs — red and green, orange and blue — in roughly equal amounts. Every stitched X is clearly visible on the even-weave fabric grid. Soft daylight from above. No text, no letters, no logos anywhere.