Op Art as a style is partly defined by its colour: this palette makes that definition concrete. Op Art keeps values measured and balanced, a hallmark of tonal restraint. Temperature is cool-dominant, with blue and green families claiming the largest areas. All colours lean toward grey, building depth through value rather than colour punch. #A59669 claims 30.0% of the surface, functioning as the work's tonal foundation. #913A22 delivers the chromatic peak at only 6.7% - a small shot of colour with outsized visual impact. The full value range is 72 units: broad enough to build convincing three-dimensional form. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Applied to contemporary work, these proportions immediately evoke the Op Art register.