This article considers two passages in which either the sky (Plin. HN 17.74) or the sun (Manilius 2.941) is described as ‘green’; it argues that in both cases such a colour epithet is out of place and proposes to correct uiridi caelo to nitido caelo in the former case, and uiridis … Phoebus to rutilus … Phoebus in the latter.