ΔE 19.2, loose: different enough that you should pick on purpose. White Star is noticeably lighter, more muted than Orc Blood.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). White Star is noticeably lighter, more muted than Orc Blood.
The same difference applies the other way round: Orc Blood is noticeably darker, more saturated.
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 Orc Blood on the colour wheel See White Star on the colour wheel
All matches: Orc Blood equivalents · White Star equivalents