A patient complains that a recently placed crown looks more yellow than the adjacent natural teeth. Which color dimension is most likely responsible for this mismatch?

Hue refers to the basic color family of a tooth — whether it appears more yellow, reddish, or gray. If a crown looks 'more yellow' than adjacent teeth, the hue is different (the crown is in a yellower hue category). Chroma refers to the intensity or saturation of a given hue — a high-chroma tooth has a more vivid, saturated color within its hue. Value refers to the lightness or darkness of the shade. A crown that looks yellower is exhibiting a hue mismatch, not a chroma mismatch.