Charcoal on cool, soft skin tones (True Summer)

The answer

Yes. Charcoal sits inside the True Summer palette. The nearest thing in the palette is #3E4A5A, ΔE 8.2 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 charcoal scores across all twelve seasons

Charcoal is an opinionated colour: Deep Winter scores it 92 and Light Spring scores it 0. A gap that wide means the colour genuinely decides something, and getting it right is worth the effort.

True Summer sits 4 of twelve at 80, 12 points behind Deep Winter. That gap is the honest size of the compromise, not a verdict on the colour.

• Deep Winter: 92 (ΔE 3.3).
• True Winter: 88 (ΔE 4.8).
• Bright Winter: 87 (ΔE 5.3).
• True Summer: 80 (ΔE 8.2) <- this season.
• Light Spring: 0 (ΔE 37.8).

What to wear it with

The palette entries closest to charcoal are the ones that will read as a deliberate pairing rather than a near-miss, because a near-miss of two similar colours is more noticeable than a clear contrast.

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