Cobalt blue on deep, cool skin tones (Deep Winter)

The answer

Yes. Cobalt blue sits inside the Deep Winter palette. The nearest thing in the palette is #1E3A5F, ΔE 10.3 away. 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 cobalt blue scores across all twelve seasons

Cobalt blue is an opinionated colour: True 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.

Deep Winter sits 3 of twelve at 74, 18 points behind True Winter. That gap is the honest size of the compromise, not a verdict on the colour.

• True Winter: 92 (ΔE 3.2).
• Bright Winter: 79 (ΔE 8.5).
• Deep Winter: 74 (ΔE 10.3) <- this season.
• Light Spring: 0 (ΔE 43.8).

What to wear it with

The palette entries closest to cobalt blue 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.

• #1E3A5F: very deep, a navy (ΔE 6.0).
• #0F3460: very deep, a navy (ΔE 5.6).
• #243A5E: very deep, a navy (ΔE 5.5).