O. Louis Guglielmi sits in the centre of the value range, lending the palette a sense of even, sustained light. O. Louis Guglielmi tilts toward cool - blues and silver-greys carry the structural weight. Chroma is moderate: colours carry enough saturation to be read as colour, but the palette stops well short of garish intensity. #0269AB is not a small accent - at 21.4% it qualifies as a major presence and gives the palette its chromatic identity. A value spread of 60 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. O. Louis Guglielmi's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.