blueward
/ˈbluːwəd/adjective
Physics and Astronomy. Situated towards the blue end of the visible spectrum; occurring in the direction of the blue end.
adverb
Towards the blue; (Physics and Astronomy ) towards the blue end of the visible spectrum; in the direction of the blue end.
Origin
Late 19th century; earliest use found in Michael Foster (1836–1907), physiologist and politician. From blue + -ward.