Chocolate brown on cool, soft skin tones (True Summer)

The answer

No. Chocolate brown sits well outside the True Summer palette. The nearest thing in the palette is #3E4A5A, ΔE 24.6 away, which is one of the four neutrals the season is built on. Under 12 reads as the same colour family; past 25 the two are visibly different colours.

It does not collide with anything on the season's avoid list, so the only question is distance.

How chocolate brown scores across all twelve seasons

Chocolate brown is an opinionated colour: Deep Autumn scores it 91 and Light Summer scores it 0. A gap that wide means the colour genuinely decides something, and getting it right is worth the effort.

True Summer sits 10 of twelve at 38, 53 points behind Deep Autumn. That gap is the honest size of the compromise, not a verdict on the colour.

• Deep Autumn: 91 (ΔE 3.5).
• True Autumn: 79 (ΔE 8.6).
• Soft Autumn: 67 (ΔE 13.4).
• True Summer: 38 (ΔE 24.6) <- this season.
• Light Summer: 0 (ΔE 39.6).

What to wear instead

Nearest first. These are the colours in the True Summer palette that get closest to what you wanted from chocolate brown, so the substitution costs the least.

• #3E4A5A: deep, a charcoal (ΔE 8.2).
• #6E7B8B: mid-tone, nearest common name grey (ΔE 14.2).
• #3E6B8C: deep, nearest common name cobalt blue (ΔE 12.4).