cornflower
indigo
dog violet
heath violet
Viola canina
sea onion
Scilla verna
spring squill
Jacob's ladder
Polemonium caeruleum
gentian blue
charity
Greek valerian
blue-eyed grass
Polymonium caeruleum van-bruntiae
Polemonium van-bruntiae
cupid's dart
berry blue
Catananche caerulea
blue succory
blue-violet
bluebottle
bluish-violet
Gentianopsis detonsa
forget-me-not
delphinium
Gentiana detonsa
Oxford blue
mouse ear
ultramarine
blue-flowered
eggshell blue
Parma violet
Virginia cowslip
woad
Mertensia virginica
tournsol
Virginia bluebell
Myosotis scorpiodes
Milori blue
Copenhagen blue
royal blue
Japanese wistaria
Wisteria floribunda
blurple
baby blue
Nile blue
steel blue
Gentiana crinita
Parochetus communis