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Recognised as Colour

#0581EF

  • #0581EF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#0581EF is a blue with RGB values 5, 129, 239 and HSL 208°, 96%, 48%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#0581EF#0581EF
HEX#0581EF
RGBrgb(5, 129, 239)
RGB (0–1)0.0196, 0.5059, 0.9373
RGB percentages2%, 50.6%, 93.7%
HSLhsl(208.2, 95.9%, 47.8%)
HSV / HSBhsv(208.2, 97.9%, 93.7%)
CMYK97.9%, 46%, 0%, 6.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer360,943
CSS custom property--colour: #0581EF;

Brightness & contrast

Relative luminance0.21965WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.39:1
Contrast with white3.89:1WCAG normal text: Fail
Contrast with black5.39:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#FA7E10

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#428BF3no red cones; affects about 1% of men; ΔE 6.1 from the original
Deuteranopia#0078EDno green cones; the most common form, about 1% of men; ΔE 6.3 from the original
Tritanopia#009CACno blue cones; rare, and affects men and women equally; ΔE 60.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.89:1WCAG large text: AA
Contrast with black, large text5.39:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 5.8Royal blue · ΔE 15.6Cornflower blue · ΔE 16.3Slate blue · ΔE 26Medium purple · ΔE 28Medium slateblue · ΔE 29.1
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 5.8, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EF7305
Analogous#05EFE8, #050CEF
Triadic#EF0581, #81EF05
Split complementary#EF050C, #EFE805
Tetradic#E805EF, #EF7305, #0CEF05

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C2E2FE
Lighter +30%#90CAFD
Lighter +20%#5EB2FC
Lighter +10%#2C9AFB
Darker −10%#0466BD
Darker −20%#034B8B
Darker −30%#023059
Darker −40%#011527
More saturated +25%#0081F4
Less saturated −25%#247FD1

Channel breakdown

R5
G129
B239
Red5 (2%)
Green129 (50.6%)
Blue239 (93.7%)
Hue208.21°
Saturation (HSL)95.9%
Lightness47.84%
Dominant channelBlue
Hex per channelR 05 · G 81 · B EF

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Every value on this page was computed from “0581ef” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.