COLOR
#084BB6
≈ Once In A Blue Moon
Values · copy any
On white
Aa
7.80:1
Passes AAA
On black
Aa
2.24:1
Fails AA
Best text on this color
Aa#FFFFFF(7.80:1)
Adjust & explore
drag the picker or wheel — values & harmonies update livePicker · drag to explore
Harmonies · live
Colour-blindness preview
Normal vision#084BB6
Protanopia#005ABA
Deuteranopia#004BB4
Tritanopia#006779
Tints & shades
Color harmonies
Open in scheme generator →Palettes with this color
Colors that go with Once In A Blue Moon
Once In A Blue Moon sits in the blue family. Pair it with warm accents — amber, coral or gold — to stop it feeling cold, or lean into its harmonies below for a ready-made scheme.
Closest named, CSS & systems
Colour nameOnce In A Blue Moon#0044BBΔE 2.5CSS nameDarkslateblue#483D8BΔE 10.9Web-safe#003399#003399ΔE 8.0
Pantone & RAL matches are coming soon — those libraries aren't openly licensed for redistribution.
Once In A Blue Moon — meaning & where to use it
Once In A Blue Moon is a rich, mid-toned blue — it reads as trustworthy, stable and professional. It's a natural fit for corporate, tech and financial brands, and dependable UI chrome. To keep it balanced, pair it with warm accents — amber, coral or gold — to stop it feeling cold.
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This exact shade isn't a named or standard-set colour, so it isn't indexed — but every tool above works.