ΔE 28.3, loose: different enough that you should pick on purpose. Ice Yellow is a little darker, much more saturated than White Room.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Ice Yellow is a little darker, much more saturated than White Room.
The same difference applies the other way round: White Room is a little lighter, much 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 White Room on the colour wheel See Ice Yellow on the colour wheel
All matches: White Room equivalents · Ice Yellow equivalents