Quite simply green blue
“This chameleon colour needs no other name, it is exactly what it says – sometimes blue and sometimes green depending on the changing of light throughout the day. Green Blue is a great favourite for family bathrooms, as the soft green adds warmth while the light blue brings a certain freshness. Try pairing with Pale Powder walls as a lighter accent. Pair with our Mid Tones Primer & Undercoat.”
– Farrow & Ball
Remember: This is a reference color, a digital image. Computer monitor settings vary, and so do light sources in your home.
Use color cards, samples, and your judgement!