Blue Tone vs Tyran Blue

How close are they?

ΔE 28.2, loose: different enough that you should pick on purpose. Tyran Blue is noticeably lighter, more saturated, cooler than Blue Tone.

✓ Army Painter Fanatic conversion chart lists these two as equivalents.

Can I use Tyran Blue instead of Blue Tone?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Tyran Blue is noticeably lighter, more saturated, cooler than Blue Tone.

Can I use Blue Tone instead of Tyran Blue?

The same difference applies the other way round: Blue Tone is noticeably darker, more muted, warmer.

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.