ΔE 21.4, loose: different enough that you should pick on purpose. Hydra Turquoise is noticeably darker, more saturated than Sky Blue Anodized Aluminum.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Hydra Turquoise is noticeably darker, more saturated than Sky Blue Anodized Aluminum.
The same difference applies the other way round: Sky Blue Anodized Aluminum is noticeably lighter, more muted.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Sky Blue Anodized Aluminum on the colour wheel See Hydra Turquoise on the colour wheel
All matches: Sky Blue Anodized Aluminum equivalents · Hydra Turquoise equivalents