Sky blue on deep, warm skin tones (Deep Autumn)

The answer

No. Sky blue sits well outside the Deep Autumn palette. The nearest thing in the palette is #8A7660, ΔE 35.5 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.

There is a second problem. Sky blue lands within ΔE 5.0 of #A8C4DC, which is on the short list of colours that actively work against Deep Autumn colouring. That is the failure people can see and cannot name.

How sky blue scores across all twelve seasons

Sky blue is an opinionated colour: Light Summer scores it 87 and Deep Autumn scores it 0. A gap that wide means the colour genuinely decides something, and getting it right is worth the effort.

Deep Autumn sits 12 of twelve at 0, 87 points behind Light Summer. That gap is the honest size of the compromise, not a verdict on the colour.

• Light Summer: 87 (ΔE 5.0).
• Light Spring: 84 (ΔE 6.5).
• True Summer: 81 (ΔE 7.6).
• Deep Autumn: 0 (ΔE 35.5) <- this season.

What to wear instead

Nearest first. These are the colours in the Deep Autumn palette that get closest to what you wanted from sky blue, so the substitution costs the least.

• #8A7660: mid-tone, nearest common name olive green (ΔE 15.0).
• #9A5828: deep, a rust (ΔE 9.5).
• #8C6420: mid-tone, nearest common name olive green (ΔE 14.5).