ΔE 26.1, loose: different enough that you should pick on purpose. Toxic Yellow is noticeably lighter, much more saturated, cooler than Morghast Bone.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Toxic Yellow is noticeably lighter, much more saturated, cooler than Morghast Bone.
The same difference applies the other way round: Morghast Bone is noticeably darker, much 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.
See Morghast Bone on the colour wheel See Toxic Yellow on the colour wheel
All matches: Morghast Bone equivalents · Toxic Yellow equivalents