Colour Swatch Picker

Colour swatch picker, a row of flat matte discs 0.03 m across at 0.038 m pitch, 0.004 m thick, count 5-8, in the five accent hues then white, grey, charcoal (colour is content, never glowing); pick circles one with a thin accent ring.

风格：low-poly, flat-shaded vertex colors, no textures, 2 materials: the shared opaque one plus a distinct surface (glass, water or chrome), which stays its own mesh through mergeAssets rather than merging into the rest; shares palette and scale with its kit