Robin egg blue

{{short description|Color}}

{{infobox color

| title=Robin egg blue

| image=American Robin Eggs in Nest.jpg

| caption=American robin eggs

| hex=00CCCC

| source=Crayola

| isccname=Brilliant bluish green}}

Robin egg blue, also called eggshell blue or robin's-egg blue,{{Cite book |title=Oxford English Dictionary |date=December 2023 |chapter=Robin's-egg Blue, N. & Adj |doi=10.1093/OED/4868676611}} is a shade of teal (a blue-green color), approximating the shade of the eggs laid by the American robin, an abundant songbird of North America. The egg pigment is biliverdin, a product of the breakdown of heme.{{cite journal |volume=94 |issue=10 |title=Isolation of Biliverdin IXα, as its Dimethyl Ester, from Emu Eggshells |year=2017 |journal=Journal of Chemical Education |pages=1533–1537 |last1=Halepas |first1=Steven |last2=Hamchand |first2=Randy |last3=Lindeyer |first3=Samuel E. D. |last4=Brückner |first4=Christian |doi=10.1021/acs.jchemed.7b00449 |bibcode=2017JChEd..94.1533H}}

The first recorded use of robin egg blue as a color name in English was in 1873,{{cite encyclopedia |author=Maerz and Paul |encyclopedia=A Dictionary of Color |location=New York |year=1930 |publisher=McGraw-Hill |page=203 |title=Color Sample of Robin Egg Blue Page 77 Plate 27 Color Sample H3}} though earlier references in English to colors similar to that of robin's eggs were made as early as 1844.{{Cite book |last=Jackson |first=C. T. |title=Final Rep. Geol. & Minerol. New Hampshire |date=1844}} The "robin's egg" glaze appeared during the Yongzheng Emperor’s reign (1722-35) in China, and Yixing potter Hua Fengxiang made works with "robin's egg" glaze.{{Cite web |title=Chitra Collection {{!}} Teapot |url=https://chitracollection.com/collection/teapot-210/?keywords=Hua%20Feng%20Xiang&pagenumber=1 |access-date=2024-08-27 |language=en-GB}}