White balance cannot be judged reliably from the RGB histogram alone. The histogram shows the distribution of tones/colors, not whether the scene’s colors are accurate.

Technically, “correct” white balance means compensating for the color of the light source so objects appear the same color they were in real life. To judge that, you need a reference in the image—ideally something known to be white or neutral gray. If that reference is lit normally, you can adjust WB until it appears neutral.

If there is no known neutral reference, it becomes much more subjective. A scene may legitimately contain more warm or cool colors, so balanced RGB channels are not a rule.

In practice:

• Use a white/gray reference when accuracy matters.
• Don’t rely on histogram balance to determine WB.
• If no reference exists, choose the version that looks natural for the lighting and subject.
• Creative WB is also valid; outside of product/color-critical work, there may be no single “correct” result.