ΔE 7.5, close: similar, with a visible difference side by side. Mana Regeneration is a little lighter, more saturated than Magic Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Mana Regeneration is a little lighter, more saturated than Magic Blue.
The same difference applies the other way round: Magic Blue is a little 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 Magic Blue on the colour wheel See Mana Regeneration on the colour wheel
All matches: Magic Blue equivalents · Mana Regeneration equivalents