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Recognised as Colour

#1639B0

  • #1639B0
  • Blue
  • Dark
  • Nearest: Slate blue

#1639B0 is a blue with RGB values 22, 57, 176 and HSL 226°, 78%, 39%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#1639B0#1639B0
HEX#1639B0
RGBrgb(22, 57, 176)
RGB (0–1)0.0863, 0.2235, 0.6902
RGB percentages8.6%, 22.4%, 69%
HSLhsl(226.4, 77.8%, 38.8%)
HSV / HSBhsv(226.4, 87.5%, 69%)
CMYK87.5%, 67.6%, 0%, 31%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,456,560
CSS custom property--colour: #1639B0;

Brightness & contrast

Relative luminance0.06231WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.35:1
Contrast with white9.35:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#E9C64F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004EB4no red cones; affects about 1% of men; ΔE 15.9 from the original
Deuteranopia#003FAEno green cones; the most common form, about 1% of men; ΔE 6.3 from the original
Tritanopia#005A6Fno blue cones; rare, and affects men and women equally; ΔE 68.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.35:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Slate blue · ΔE 17.5Royal blue · ΔE 19.8Rebecca purple · ΔE 20.7Navy · ΔE 21.2Midnight blue · ΔE 21.9Dark blue · ΔE 21.9
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 17.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B08D16
Analogous#1686B0, #4016B0
Triadic#B01639, #39B016
Split complementary#B04016, #86B016
Tetradic#B01686, #B08D16, #16B040

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9FB2F3
Lighter +30%#728EED
Lighter +20%#4469E8
Lighter +10%#1C48DD
Darker −10%#102A83
Darker −20%#0B1C55
Darker −30%#050D28
Darker −40%#000000
More saturated +25%#002DC6
Less saturated −25%#2F4797

Channel breakdown

R22
G57
B176
Red22 (8.6%)
Green57 (22.4%)
Blue176 (69%)
Hue226.36°
Saturation (HSL)77.78%
Lightness38.82%
Dominant channelBlue
Hex per channelR 16 · G 39 · B B0

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Every value on this page was computed from “1639b0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.