Mustard on bright, high-contrast skin tones (Bright Winter)

The answer

Close, but not a match. Mustard sits just outside the Bright Winter palette. The nearest thing in the palette is #FFCC00, ΔE 12.1 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 mustard scores across all twelve seasons

Mustard is an opinionated colour: True Autumn scores it 81 and True Winter scores it 0. A gap that wide means the colour genuinely decides something, and getting it right is worth the effort.

Bright Winter sits 4 of twelve at 70, 11 points behind True Autumn. That gap is the honest size of the compromise, not a verdict on the colour.

• True Autumn: 81 (ΔE 7.6).
• True Spring: 79 (ΔE 8.4).
• Bright Spring: 75 (ΔE 10.0).
• Bright Winter: 70 (ΔE 12.1) <- this season.
• True Winter: 0 (ΔE 34.1).

What to wear instead

Nearest first. These are the colours in the Bright Winter palette that get closest to what you wanted from mustard, so the substitution costs the least.

• #FFCC00: light, nearest common name mustard (ΔE 12.1).
• #C8FF00: very light, no common colour word lands near it, cream is the closest (ΔE 27.3).
• #B8FF2E: very light, no common colour word lands near it, cream is the closest (ΔE 27.4).