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Recognised as Colour

#102F81

  • #102F81
  • Blue
  • Dark
  • Nearest: Dark slateblue

#102F81 is a blue with RGB values 16, 47, 129 and HSL 224°, 78%, 28%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#102F81#102F81
HEX#102F81
RGBrgb(16, 47, 129)
RGB (0–1)0.0627, 0.1843, 0.5059
RGB percentages6.3%, 18.4%, 50.6%
HSLhsl(223.5, 77.9%, 28.4%)
HSV / HSBhsv(223.5, 87.6%, 50.6%)
CMYK87.6%, 63.6%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,060,737
CSS custom property--colour: #102F81;

Brightness & contrast

Relative luminance0.03728WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.03:1
Contrast with white12.03:1WCAG normal text: AAA
Contrast with black1.75:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#EFD07E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003C84no red cones; affects about 1% of men; ΔE 10.6 from the original
Deuteranopia#00317Fno green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#004453no blue cones; rare, and affects men and women equally; ΔE 49.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.03:1WCAG large text: AAA
Contrast with black, large text1.75:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.2Midnight blue · ΔE 11.4Rebecca purple · ΔE 22.7Slate blue · ΔE 27.6Indigo · ΔE 29.4Royal blue · ΔE 30
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.24, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#816210
Analogous#106781, #291081
Triadic#81102F, #2F8110
Split complementary#812A10, #678110
Tetradic#811068, #816210, #10812A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7092ED
Lighter +30%#4270E8
Lighter +20%#1B50DC
Lighter +10%#1640AE
Darker −10%#0A1E54
Darker −20%#050E26
Darker −30%#000000
Darker −40%#000000
More saturated +25%#002891
Less saturated −25%#22376F

Channel breakdown

R16
G47
B129
Red16 (6.3%)
Green47 (18.4%)
Blue129 (50.6%)
Hue223.54°
Saturation (HSL)77.93%
Lightness28.43%
Dominant channelBlue
Hex per channelR 10 · G 2F · B 81

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Every value on this page was computed from “102f81” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.