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Recognised as Colour

#101A42

  • #101A42
  • Blue
  • Dark
  • Nearest: Dark slateblue

#101A42 is a blue with RGB values 16, 26, 66 and HSL 228°, 61%, 16%. It is a dark colour, so white text on it reaches 16.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#101A42#101A42
HEX#101A42
RGBrgb(16, 26, 66)
RGB (0–1)0.0627, 0.102, 0.2588
RGB percentages6.3%, 10.2%, 25.9%
HSLhsl(228, 61%, 16.1%)
HSV / HSBhsv(228, 75.8%, 25.9%)
CMYK75.8%, 60.6%, 0%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,055,298
CSS custom property--colour: #101A42;

Brightness & contrast

Relative luminance0.01242WCAG 2.x, 0 is black and 1 is white
Perceived brightness31.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.82:1
Contrast with white16.82:1WCAG normal text: AAA
Contrast with black1.25:1WCAG normal text: Fail
Greyscale equivalent#1B1B1B
Inverted#EFE5BD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#022043no red cones; affects about 1% of men; ΔE 6.8 from the original
Deuteranopia#001B41no green cones; the most common form, about 1% of men; ΔE 3.9 from the original
Tritanopia#00242Bno blue cones; rare, and affects men and women equally; ΔE 28 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.82:1WCAG large text: AAA
Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 29.1Midnight blue · ΔE 30.9Black · ΔE 31.1Dark slate grey · ΔE 38.5Rebecca purple · ΔE 43.5Dim grey · ΔE 44.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 29.11, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#423810
Analogous#103342, #1F1042
Triadic#42101A, #1A4210
Split complementary#421F10, #334210
Tetradic#421033, #423810, #10421F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4B66D3
Lighter +30%#2E4BBD
Lighter +20%#243A94
Lighter +10%#1A2A6B
Darker −10%#060A19
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#06144C
Less saturated −25%#1A2038

Channel breakdown

R16
G26
B66
Red16 (6.3%)
Green26 (10.2%)
Blue66 (25.9%)
Hue228°
Saturation (HSL)60.98%
Lightness16.08%
Dominant channelBlue
Hex per channelR 10 · G 1A · B 42

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Every value on this page was computed from “101a42” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.