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Recognised as Colour

#1639A3

  • #1639A3
  • Blue
  • Dark
  • Nearest: Midnight blue

#1639A3 is a blue with RGB values 22, 57, 163 and HSL 225°, 76%, 36%. It is a dark colour, so white text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1639A3#1639A3
HEX#1639A3
RGBrgb(22, 57, 163)
RGB (0–1)0.0863, 0.2235, 0.6392
RGB percentages8.6%, 22.4%, 63.9%
HSLhsl(225.1, 76.2%, 36.3%)
HSV / HSBhsv(225.1, 86.5%, 63.9%)
CMYK86.5%, 65%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,456,547
CSS custom property--colour: #1639A3;

Brightness & contrast

Relative luminance0.05741WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.78:1
Contrast with white9.78:1WCAG normal text: AAA
Contrast with black2.15:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#E9C65C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004BA6no red cones; affects about 1% of men; ΔE 14.4 from the original
Deuteranopia#003DA1no green cones; the most common form, about 1% of men; ΔE 5 from the original
Tritanopia#005568no blue cones; rare, and affects men and women equally; ΔE 62 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.78:1WCAG large text: AAA
Contrast with black, large text2.15:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 16.8Slate blue · ΔE 17.9Dark slateblue · ΔE 18.7Rebecca purple · ΔE 18.9Royal blue · ΔE 20.1Navy · ΔE 24.1
Nearest named CSS colourMidnight blue (#191970)ΔE 16.84, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A38016
Analogous#1680A3, #3916A3
Triadic#A31639, #39A316
Split complementary#A33916, #80A316
Tetradic#A31680, #A38016, #16A339

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#94ABF1
Lighter +30%#6788EB
Lighter +20%#3B65E4
Lighter +10%#1C49D0
Darker −10%#102976
Darker −20%#0A1A49
Darker −30%#040A1C
Darker −40%#000000
More saturated +25%#002EB9
Less saturated −25%#2D458C

Channel breakdown

R22
G57
B163
Red22 (8.6%)
Green57 (22.4%)
Blue163 (63.9%)
Hue225.11°
Saturation (HSL)76.22%
Lightness36.27%
Dominant channelBlue
Hex per channelR 16 · G 39 · B A3

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Every value on this page was computed from “1639a3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.