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Recognised as Colour

#578CFB

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

#578CFB is a blue with RGB values 87, 140, 251 and HSL 221°, 95%, 66%. 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

#578CFB#578CFB
HEX#578CFB
RGBrgb(87, 140, 251)
RGB (0–1)0.3412, 0.549, 0.9843
RGB percentages34.1%, 54.9%, 98.4%
HSLhsl(220.6, 95.3%, 66.3%)
HSV / HSBhsv(220.6, 65.3%, 98.4%)
CMYK65.3%, 44.2%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,737,723
CSS custom property--colour: #578CFB;

Brightness & contrast

Relative luminance0.27747WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.55:1
Contrast with white3.21:1WCAG normal text: Fail
Contrast with black6.55:1WCAG normal text: AA
Greyscale equivalent#898989
Inverted#A87304

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5698FFno red cones; affects about 1% of men; ΔE 7.6 from the original
Deuteranopia#3989F9no green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#00A6B7no blue cones; rare, and affects men and women equally; ΔE 62.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.21:1WCAG large text: AA
Contrast with black, large text6.55:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 7.6Cornflower blue · ΔE 13.9Royal blue · ΔE 15.7Medium purple · ΔE 22.9Slate blue · ΔE 24Medium slateblue · ΔE 25.6
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 7.57, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FBC657
Analogous#57DEFB, #7457FB
Triadic#FB578C, #8CFB57
Split complementary#FB7457, #DEFB57
Tetradic#FB57DE, #FBC657, #57FB74

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#ECF2FF
Lighter +20%#BBD0FD
Lighter +10%#89AEFC
Darker −10%#256AFA
Darker −20%#054EE7
Darker −30%#043DB5
Darker −40%#032C83
More saturated +25%#538BFF
Less saturated −25%#6C94E5

Channel breakdown

R87
G140
B251
Red87 (34.1%)
Green140 (54.9%)
Blue251 (98.4%)
Hue220.61°
Saturation (HSL)95.35%
Lightness66.27%
Dominant channelBlue
Hex per channelR 57 · G 8C · B FB

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