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Colour

#0100A9

  • #0100A9
  • Blue
  • Dark
  • Nearest: Dark blue

#0100A9 is a blue with RGB values 1, 0, 169 and HSL 240°, 100%, 33%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#0100A9#0100A9
HEX#0100A9
RGBrgb(1, 0, 169)
RGB (0–1)0.0039, 0, 0.6627
RGB percentages0.4%, 0%, 66.3%
HSLhsl(240.4, 100%, 33.1%)
HSV / HSBhsv(240.4, 100%, 66.3%)
CMYK99.4%, 100%, 0%, 33.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer65,705
CSS custom property--colour: #0100A9;

Brightness & contrast

Relative luminance0.02871WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.34:1
Contrast with white13.34:1WCAG normal text: AAA
Contrast with black1.57:1WCAG normal text: Fail
Greyscale equivalent#0C0C0C
Inverted#FEFF56

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0038ADno red cones; affects about 1% of men; ΔE 29.7 from the original
Deuteranopia#0025A7no green cones; the most common form, about 1% of men; ΔE 18 from the original
Tritanopia#004461no blue cones; rare, and affects men and women equally; ΔE 86.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.34:1WCAG large text: AAA
Contrast with black, large text1.57:1WCAG large text: Fail

Named colours

Dark blue · ΔE 13.9Medium blue · ΔE 16.2Navy · ΔE 19.2Blue violet · ΔE 25.9Indigo · ΔE 26.7Dark violet · ΔE 28.4
Nearest named CSS colourDark blue (#00008B)ΔE 13.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A8A900
Analogous#0054A9, #5500A9
Triadic#A90100, #00A901
Split complementary#A95600, #53A900
Tetradic#A90054, #A8A900, #00A956

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7776FF
Lighter +30%#4443FF
Lighter +20%#1110FF
Lighter +10%#0100DC
Darker −10%#010076
Darker −20%#000043
Darker −30%#000010
Darker −40%#000000
More saturated +25%#0100A9
Less saturated −25%#161594

Channel breakdown

R1
G0
B169
Red1 (0.4%)
Green0 (0%)
Blue169 (66.3%)
Hue240.36°
Saturation (HSL)100%
Lightness33.14%
Dominant channelBlue
Hex per channelR 01 · G 00 · B A9

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Every value on this page was computed from “0100a9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.