ΔE 12.8, fair: the same colour family, but not a straight swap. Transparent Phthalo Green (Blue Shade) is a little darker, more muted, cooler than Tesseract Glow. They are different kinds of paint: Citadel Tesseract Glow is a technical paint or medium and Golden Transparent Phthalo Green (Blue Shade) is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Transparent Phthalo Green (Blue Shade) is a little darker, more muted, cooler than Tesseract Glow. They are different kinds of paint.
The same difference applies the other way round: Tesseract Glow is a little lighter, more saturated, 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 Tesseract Glow on the colour wheel See Transparent Phthalo Green (Blue Shade) on the colour wheel
All matches: Tesseract Glow equivalents · Transparent Phthalo Green (Blue Shade) equivalents