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Recognised as Colour

#0100AB

  • #0100AB
  • Blue
  • Dark
  • Nearest: Dark blue

#0100AB is a blue with RGB values 1, 0, 171 and HSL 240°, 100%, 34%. It is a dark colour, so white text on it reaches 13.2:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#0100AB#0100AB
HEX#0100AB
RGBrgb(1, 0, 171)
RGB (0–1)0.0039, 0, 0.6706
RGB percentages0.4%, 0%, 67.1%
HSLhsl(240.4, 100%, 33.5%)
HSV / HSBhsv(240.4, 100%, 67.1%)
CMYK99.4%, 100%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer65,707
CSS custom property--colour: #0100AB;

Brightness & contrast

Relative luminance0.02947WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.21:1
Contrast with white13.21:1WCAG normal text: AAA
Contrast with black1.59:1WCAG normal text: Fail
Greyscale equivalent#0D0D0D
Inverted#FEFF54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0039AFno red cones; affects about 1% of men; ΔE 30.1 from the original
Deuteranopia#0026A9no green cones; the most common form, about 1% of men; ΔE 18.4 from the original
Tritanopia#004563no blue cones; rare, and affects men and women equally; ΔE 87.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.21:1WCAG large text: AAA
Contrast with black, large text1.59:1WCAG large text: Fail

Named colours

Dark blue · ΔE 14.8Medium blue · ΔE 15.3Navy · ΔE 20.1Blue violet · ΔE 25.5Indigo · ΔE 27.5Dark violet · ΔE 28.1
Nearest named CSS colourDark blue (#00008B)ΔE 14.84, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AAAB00
Analogous#0054AB, #5700AB
Triadic#AB0100, #00AB01
Split complementary#AB5700, #54AB00
Tetradic#AB0054, #AAAB00, #00AB57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7978FF
Lighter +30%#4645FF
Lighter +20%#1312FF
Lighter +10%#0100DE
Darker −10%#010078
Darker −20%#000045
Darker −30%#000012
Darker −40%#000000
More saturated +25%#0100AB
Less saturated −25%#161596

Channel breakdown

R1
G0
B171
Red1 (0.4%)
Green0 (0%)
Blue171 (67.1%)
Hue240.35°
Saturation (HSL)100%
Lightness33.53%
Dominant channelBlue
Hex per channelR 01 · G 00 · B AB

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Every value on this page was computed from “0100ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.