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Recognised as Colour

#578AFF

  • #578AFF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#578AFF is a blue with RGB values 87, 138, 255 and HSL 222°, 100%, 67%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#578AFF#578AFF
HEX#578AFF
RGBrgb(87, 138, 255)
RGB (0–1)0.3412, 0.5412, 1
RGB percentages34.1%, 54.1%, 100%
HSLhsl(221.8, 100%, 67.1%)
HSV / HSBhsv(221.8, 65.9%, 100%)
CMYK65.9%, 45.9%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,737,215
CSS custom property--colour: #578AFF;

Brightness & contrast

Relative luminance0.27423WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.48:1
Contrast with white3.24:1WCAG normal text: Fail
Contrast with black6.48:1WCAG normal text: AA
Greyscale equivalent#888888
Inverted#A87500

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4E97FFno red cones; affects about 1% of men; ΔE 10.8 from the original
Deuteranopia#2D88FDno green cones; the most common form, about 1% of men; ΔE 5.4 from the original
Tritanopia#00A5B8no blue cones; rare, and affects men and women equally; ΔE 64.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.24:1WCAG large text: AA
Contrast with black, large text6.48:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 9.6Royal blue · ΔE 13.5Cornflower blue · ΔE 17.6Medium purple · ΔE 22.2Slate blue · ΔE 22.3Medium slateblue · ΔE 22.8
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 9.62, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFCC57
Analogous#57DEFF, #7857FF
Triadic#FF578A, #8AFF57
Split complementary#FF7857, #DEFF57
Tetradic#FF57DE, #FFCC57, #57FF78

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#F0F5FF
Lighter +20%#BDD1FF
Lighter +10%#8AAEFF
Darker −10%#2466FF
Darker −20%#0049F0
Darker −30%#0039BD
Darker −40%#002A8A
More saturated +25%#578AFF
Less saturated −25%#6C92EA

Channel breakdown

R87
G138
B255
Red87 (34.1%)
Green138 (54.1%)
Blue255 (100%)
Hue221.79°
Saturation (HSL)100%
Lightness67.06%
Dominant channelBlue
Hex per channelR 57 · G 8A · B FF

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Every value on this page was computed from “578aff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.