ΔE 17.1, loose: different enough that you should pick on purpose. Blood Red Skies is noticeably lighter, more saturated than Dragon Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Blood Red Skies is noticeably lighter, more saturated than Dragon Red.
The same difference applies the other way round: Dragon Red is noticeably darker, 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 Dragon Red on the colour wheel See Blood Red Skies on the colour wheel
All matches: Dragon Red equivalents · Blood Red Skies equivalents