It depends on the lens.

Chromatic aberration happens because a lens’s glass bends different wavelengths of light by different amounts. The exact pattern depends on the glass types used and how the lens is designed. So there is no universal rule that red must always shift inward or outward, or that the other colors must follow a fixed order and spacing.

In a simple case, the shift may vary roughly with wavelength, but the sign can differ—so red could appear inside or outside, with green somewhere between. Lens designers often combine different glass types to reduce this effect, and when they do that well, more complex higher-order behavior can remain instead of a simple linear pattern.

So for matching footage, don’t assume one constant RGB displacement model for every shot. The most accurate approach is to judge it from the specific lens/footage you’re matching.