Wel-hǽwen

According to the Old English Dictionary:

wel-hǽwen

adj. Beautifully blue:--Ðæt bleóh ðæs welhǽwnan iacintes bið betera ðonne ðæs blácan carbuncules coerulei coloris hyacinthus praefertur pallenti carbunculo, Past. 52; Swt. 411, 28. wel-hæwen